Friday, 5 April 2013

Quantum tricks drive magnetic switching into the fast lane

Apr. 3, 2013 ? Researchers at the U.S. Department of Energy's Ames Laboratory, Iowa State University, and the University of Crete in Greece have found a new way to switch magnetism that is at least 1000 times faster than currently used in magnetic memory technologies. Magnetic switching is used to encode information in hard drives, magnetic random access memory and other computing devices.

The discovery, reported in the April 4 issue of Nature, potentially opens the door to terahertz (1012 hertz) and faster memory speeds.

Ames Laboratory physicist Jigang Wang and his team used short laser pulses to create ultra-fast changes in the magnetic structure, within quadrillionths of a second (femtosecond), from anti-ferromagnetic to ferromagnetic ordering in colossal magnetoresistive materials, which are promising for use in next-generation memory and logic devices. Scientists, led by Ilias E. Perakis, at the University of Crete developed the theory to explain the observation.

So, some scientists have turned their attention to colossal magnetoresistive (CMR) materials because they are highly responsive to the external magnetic fields used to write data into memory, but do not require heat to trigger magnetic switching.

"Colossal magnetoresistive materials are very appealing for use in technologies, but we still need to understand more about how they work," said Wang. "And, in particular, we must understand what happens during the very short periods of time when heating is not significant and the laser pulses are still interacting with magnetic moments in CMR materials. That means we must describe the process and control magnetism using quantum mechanics. We called this 'quantum femto-magnetism.'"

Wang's team specializes in using ultra-fast spectroscopy, which Wang likens to high-speed strobe photography, because both use an external pump of energy to trigger a quick snapshot that can be then re-played afterwards. In ultra-fast laser spectroscopy, a short pulse of laser light is used to excite a material and trigger a measurement all on the order of femtoseconds.

"In one CMR manganite material, the magnetic order is switched during the 100-femtosecond-long laser pulse. This means that switching occurs by manipulating spin and charge quantum mechanically," said Wang. "In the experiments, the second laser pulse 'saw' a huge photo-induced magnetization with an excitation threshold behavior developing immediately after the first pump pulse."

The fast switching speed and huge magnetization that Wang observed meet both requirements for applying CMR materials in ultra-fast, terahertz magnetic memory and logic devices.

"Our strategy is to use all-optical quantum methods to achieve magnetic switching and control magnetism. This lays the groundwork for seeking the ultimate switching speed and capabilities of CMR materials, a question that underlies the entire field of spin-electronics," said Wang. "And our hope is that this means someday we will be able to create devices that can read and write information faster than ever before, yet with less power consumed."

Tianqi Li, Aaron Patz, Jiaqiang Yan and Thomas Lograsso collaborated on the experimental work at Ames Laboratory and Iowa State University. Leonidas Mouchliadis at the University of Crete and the Institute of Electronic Structure and Laser at the Foundation for Research and Technology -- Hellas in Greece helped develop the theory used to interpret the experiments.

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The above story is reprinted from materials provided by DOE/Ames Laboratory.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Tianqi Li, Aaron Patz, Leonidas Mouchliadis, Jiaqiang Yan, Thomas A. Lograsso, Ilias E. Perakis, Jigang Wang. Femtosecond switching of magnetism via strongly correlated spin?charge quantum excitations. Nature, 2013; 496 (7443): 69 DOI: 10.1038/nature11934

Note: If no author is given, the source is cited instead.

Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_technology/~3/3AHiZ4q09Ew/130403200312.htm

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Thursday, 4 April 2013

HTC First: Pure Facebook Phone (Update: Hands On)

The HTC First is a new smartphone that's deeply integrated with Facebook Home. The AT&T phone runs on a modified version of Jelly Bean and it's the only phone to come pre-loaded with Facebook Home. More »


Source: http://feeds.gawker.com/~r/gizmodo/full/~3/5zz85QHQnHg/htc-first-pure-facebook-phone

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As Facebook matures, is it losing its edge?

This photo taken Monday March 25,2013 of Daniel Singer,13 works at his computer at his home in Los Angeles. Singer, thinks the average teenager wants to see new stuff. Twitter, comes to mind, along with Instagram and Pheed, a photo-text-video-audio sharing app launched last fall. For Singer, Facebook is part of a daily routine. ?Kind of like brushing your teeth,? he says. (AP Photo/Nick Ut)

This photo taken Monday March 25,2013 of Daniel Singer,13 works at his computer at his home in Los Angeles. Singer, thinks the average teenager wants to see new stuff. Twitter, comes to mind, along with Instagram and Pheed, a photo-text-video-audio sharing app launched last fall. For Singer, Facebook is part of a daily routine. ?Kind of like brushing your teeth,? he says. (AP Photo/Nick Ut)

(AP) ? To see what Facebook has become, look no further than the Hutzler 571 Banana Slicer.

Sometime last year, people began sharing tongue-in-cheek online reviews of the banana-shaped piece of yellow plastic with their Facebook friends. Then those friends shared with their friends. Soon, after Amazon paid to promote it, posts featuring the $3.49 utensil were appearing in even more Facebook feeds.

At some point, though, the joke got old. But there it was, again and again ? the banana slicer had become a Facebook version of that old knock-knock joke your weird uncle has been telling for years.

The Hutzler 571 phenomenon is a regular occurrence on the world's biggest online social network, which begs the question: Has Facebook become less fun?

That's something many users ? especially those in their teens and early 20s ? are asking themselves as they wade through endless posts, photos "liked" by people they barely know and spur-of-the moment friend requests. Has it all become too much of a chore? Are the important life events of your closest loved ones drowning in a sea of banana slicer jokes?

"When I first got Facebook I literally thought it was the coolest thing to have. If you had a Facebook you kind of fit in better, because other people had one," says Rachel Fernandez, 18, who first signed on to the site four or five years ago.

And now? "Facebook got kind of boring," she says.

Chatter about Facebook's demise never seems to die down, whether it's talk of "Facebook fatigue," or grousing about how the social network lost its cool once grandma joined. The Pew Research Center's Internet and American Life Project recently found that some 61 percent of Facebook users had taken a hiatus from the site for reasons that range from "too much gossip and drama" to "boredom." Some respondents said there simply isn't enough time in their day for Facebook.

If Facebook Inc.'s users leave, or even check in less frequently, its revenue growth would suffer. The company, which depends on targeted advertising for most of the money it makes, booked revenue of $5.1 billion in 2012, up from $3.7 billion a year earlier.

But so far, for every person who has left permanently, several new people have joined up. Facebook has more than 1 billion users around the world. Of these, 618 million sign in every day.

Indeed, Fernandez hasn't abandoned Facebook. Though the Traverse City, Mich., high school senior doesn't look at her News Feed, the constant cascade of posts, photos and viral videos from her nearly 1,800 friends, she still uses Facebook's messaging feature to reach out to people she knows, such as a German foreign exchange student she met two years ago.

Fernandez uses Facebook in the same way that people use email or the telephone. But she prefers using Facebook to communicate because everyone she knows is there. That's a sign that Facebook's biggest asset may also be its biggest challenge.

"We have never seen a social space that actually works for everybody," says danah boyd, who studies youth culture, the Internet and social media as a senior researcher at Microsoft Research. "People don't want to hang out with everybody they have ever met."

Might Facebook go the way of email? Those who came of age in the "You've got mail" era can reminisce fondly about arriving home from school and checking their AOL accounts to see if anyone sent them an electronic message. Boyd, who is 35 (and legally spells her name with no capitalization), recalls being a teenager and "thinking email is the best thing ever."

Few people share that sentiment these days. Ian Bogost, professor at the Georgia Institute of Technology, recently listed email alongside "Blood, frogs, lice, flies, pestilence, boils, hail, locusts, darkness, death of the firstborn" in a Facebook post.

"I was just going through my daily email routine, reflecting on the fact that it feels like batting down a wall of locusts," Bogost says.

Although email has gone from after-school treat to a dull routine in the space of 20 years, no one is ready to ring its death knell just yet. And similarly, Facebook's lost luster doesn't necessarily foreshadow its obsolescence.

"I don't see teenagers leaving in droves," boyd says. "I just don't see it being their site of passion."

In early March, Facebook unveiled a big redesign to address some of its users' most pressing gripes. The retooling, which is already available to some people, is intended to get rid of the clutter that's been a complaint among Facebook users for some time.

Facebook surveys its users regularly about their thoughts on the site. Jane Leibrock, whose title at Facebook is user experience researcher, says it was about a year ago that she noticed people were complaining about "clutter" in their feeds. Leibrock asked them what they meant. It turns out that the different types of content flowing through people's News Feeds ? links, ads, photos, status updates, things people "liked" or commented on ? were "making it difficult to focus on any one thing," she says. "It might have even been discouraging them from finding new content."

The new design seeks to address the issue. There is a distinct feed for "all friends," another for different groups of friends, one just for photos, and one for pages that users follow. As a result, says Chris Struhar, the lead engineer on the new design, the new feeds give people a way to see everything that's going on.

"The amount of stories you have available to see has continued to increase," Struhar says. "What we try to do now is give you more control over what stories you see in your feed."

With that kind of control, the company hopes people will spend more time on the site and share more information about themselves so companies can target them better with advertisements.

Paul Friedman, a 59-year-old dentist in New York City, says he's using Facebook less now than when he first signed on four years ago, but he's not sure if the site has "become less interesting or that I am just less interested in it," he says.

"I think that it might have seemed more interesting in the past because it was a new 'forum,'" Friedman says. "Now that it is not new, it takes more unique content to make it interesting."

That said, Friedman still uses Facebook to see if friends are organizing events, such as music gigs or yoga classes, or to check out interesting YouTube videos. He says seeing the same jokes reappear doesn't really bother him.

"Ninety-nine percent of it is a waste of time anyway," he says. "If it wasn't for the one percent, I'd close my account."

When it comes to people of a certain age, Friedman may be in the minority. Tammy Gordon, vice president of the AARP's social media team, says the 50-plus set is just now settling into Facebook. The organization's own Facebook page grew from 80,000 fans to a million last year. This age group is growing the fastest because older people tend to be latecomers to Facebook. According to a recent Pew survey, 32 percent of people 65 or older use social networking sites, compared with 83 percent of those 18 to 29.

"They are not necessarily at that point where some of the younger generation is, where they have News Feed overload," Gordon says.

Robert Worden, who is 62 and has nearly 1,100 friends on Facebook, isn't overwhelmed. He says he got on Facebook two or three years ago primarily to establish a relationship with his estranged son, whom he didn't see for a quarter century before he found him on Facebook.

Through his son, he also found out he had a granddaughter, who has been adopted and used Facebook to find her biological family when she turned 18. They are now all connected.

Worden, who lives in Paducah, Ky., says he probably wouldn't have found his son were it not for Facebook, never mind his granddaughter. He also reconnected with people from his Memphis, Tenn., neighborhood using Facebook ? people he had not seen in half a century. The neighborhood, he says, "literally fell apart" in the 1960s, "and we had never been able to get back together."

"So someone said 'why don't you start a Facebook page?" he says. The group recently had its first reunion. Fifty people showed up.

Worden says Facebook is his "major communication tool to the world."

"Other people use news and I don't find the nightly news or daily news to be adequate," he says. "On Facebook I can actually hear from people who are living in the places where things are happening, and I can get instant information."

Daniel Singer is 13 and, according to his public Facebook profile, he enjoys "designing beautiful user interfaces and sitting down at my desk and creating great iOS apps." Last year, the eighth-grader created YouTell, a site that lets people ask for anonymous feedback from friends. You can use Facebook to log in, or email. As someone who designs applications, Singer calls Facebook's graphical design "brilliant." Still, he thinks the average teenager wants to see new stuff. Twitter comes to mind, along with Instagram and Pheed, a photo-text-video-audio sharing app launched last fall.

For Singer, Facebook is part of a daily routine. "Kind of like brushing your teeth," he says.

In the seven years since Mark Zuckerberg started Facebook in his Harvard dormitory, Facebook has moved from a closed social networking service available to college students to a place where one seventh of the world's population logs in at least once a month. No other social networking fad has accomplished such a feat.

Facebook predecessors MySpace and Friendster shone brightly but fizzled once finicky teenagers moved on to the next big thing. To boyd, though, Facebook is not only a destination site, but "a technical architecture that underlies many different things."

"It's not about new features to lure people back in," boyd says. A bigger question now, she says: What does it mean when your company is providing a vital service, rather than "a fun, glittery object"?

Wikipedia founder Jimmy Wales, whose for-profit content creation site Wikia recently surveyed its young users about their technology habits, agrees. Teenagers, he says, "do see value in Facebook."

"I think we are seeing a shift from (it being) a place to talk to each other as just part of the world ?the infrastructure of the world," he says. "I don't know if that's to the detriment of Facebook in the long run."

__

Follow Barbara Ortutay on Twitter at https://twitter.com/BarbaraOrtutay

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/495d344a0d10421e9baa8ee77029cfbd/Article_2013-04-02-US-TEC-Facebook-Less-Fun/id-9c7c8bf1460c4b759ef28c932ee1831a

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Wednesday, 3 April 2013

What does new law for genetically modified crops really do?

An uproar has erupted on social media platforms in the days following President Obama's signing into law legislation opponents are deriding as the Monsanto Protection Act - but groups disagree about what the real consequences of the bill will be.

The derogatory name for the bill refers to the biotech company, Monsanto, which opponents say lucked out with the measure's passage. Critics see it as a win for peddlers of genetically-modified foods and a danger to farmers and consumers alike.

It passed as part of the continuing resolution whisked through Congress earlier this month to avoid a government shutdown slated for March 27. Obama signed that bill on Tuesday, while many in Washington were preoccupied with the debate over same-sex marriage.

The section of the CR that groups are objecting to - section 735 - dealt with how questionable crops can be regulated. In the event that a seed is approved by the USDA but that approval is challenged by a court ruling, the seed can still be used and sold until the USDA says otherwise, according to that new law.

It does not mention genetically modified crops by name, and it does not stop the USDA from taking those crops off the market in the future.

"The language doesn't require USDA to approve biotech crops. It also doesn't prevent individuals from suing the government over a biotech crop approval," said a source from the office of Sen. Roy Blunt, ranking member on the Senate Agriculture Subcommittee.

Even so, a USDA spokesperson said Agriculture Secretary Tom Vilsack asked for a review of section 735, "as it appears to preempt judicial review of a deregulatory action, which may make the provision unenforceable."

Critics of the bill include members of the Senate.

Sen. Barbara Mikulski, D-Md., who replaced former Sen. Daniel Inouye, D-Hawaii, as chairwoman of the Senate Appropriations Committee, released a statement Friday distancing herself from the agriculture appropriation.

"Sen. Mikulski understands the anger over this provision. She didn't put the language in the bill and doesn't support it either," the statement from her office said. "It was originally part of the Agriculture Appropriations bill that the House Appropriations Committee reported in June 2012, and it became part of the joint House-Senate agreement completed in the fall of 2012 before Sen. Mikulski became appropriations chairwoman."

Sen. Jon Tester, D-Mont., proposed an amendment to take the rider out of the CR, but it never came to a vote. A statement from his office slammed the House of Representatives for "slipping 'corporate giveaways' into a must-pass government funding bill."

"Montanans elected me to the Senate to do away with shady backroom deals and to make government work better," Tester said in the statement sent out in mid-March, before the passage of the CR. "These provisions are giveaways worth millions of dollars to a handful of the biggest corporations in this country and deserve no place in this bill."

Blunt told Politico he worked with Monsanto in hammering out the details of the legislation.

"From a practical level, it shows the political muscle that Monsanto and the biotech industry have," Neil Hamilton, director of the Agricultural Law Center at Drake University, told ABC News Friday. "They're the ones that have the most to gain directly, in terms of it being their technologies."

So the big questions seem to be how far the power of the court should extend over the authority of the Department of Agriculture and whether a big corporation exercised undue influence in this legislative process. But some advocacy groups are moving the discussion into different territory.

Food Democracy Now!, an organic food advocacy campaign, is asking followers to sign a petition that links the rider and labeling of genetically-modified products.

The letter told the president that the signer is "outraged that Congress allowed Section 735, the Monsanto Protection Act in a short-term spending bill and passed it and that you have now signed it into law," and asked him to pass an executive order "to require the mandatory labeling of genetically engineered foods."

But the act in question applied to the planting and harvesting of crops, not how they are packaged.

Left-leaning activists are not the only ones possibly slanting the message on this act.

Julie Gunlock, of the pro-free-market think tank the Independent Women's Forum, framed the bill as good for "moms like me."

"If we're in a situation where farmers are forced to lose their crops, lose their entire harvests, that will raise prices. That ultimately harms me, the consumer, the mom," Gunlock said.

In the scenario Gunlock painted, regulations would automatically stop all farmers from using a seed once a federal court ruled that the USDA should not have approved it. But according to Colin O'Neil, director of government affairs at the Center for Food Safety, that was not the case before the new bill passed.

Before the passage of the CR, O'Neil said, farmers who had previously bought seeds that were under review could still plant and harvest them. Only those who had not already legally purchased those seeds would not be allowed to.

The bottom line for O'Neil was that when the CR expires in September, it's time to make sure the rule is properly vetted and, in the view of the Center for Food Safety, thrown out.

"We have called on Chairwoman Mikulski and the Senate leadership to make sure that this rider does not extend past the life of this bill," O'Neil said. "We're extremely disappointed that this rider was put into a must-pass bill, and we're disappointed that there was no floor time given to debate and potentially strike this amendment from the bill. However, we recognize that this was kind of a hostage style negotiations over this bill and that there were a number of policy riders that were included."

O'Neil said the Center for Food Safety is confident that Mikulski will "steer this ship in the right direction."

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Source: http://news.yahoo.com/law-spurs-controversy-debate-over-124409565.html

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Michael Jackson $40 Billion Wrongful Death Trail Begins

Family blames concert promoter AEG Live for pop icon's death.
By Gil Kaufman


Michael Jackson
Photo: Sony Pictures

Source: http://www.mtv.com/news/articles/1704813/michael-jackson-wrondful-death-trial-begins.jhtml

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Mark Sanford Wins S.C. Runoff, but Colbert Busch Still Blocks His Path to Redemption

Former South Carolina Gov. Mark Sanford will be the Republican nominee on a ballot in his home state for the first time in seven years, after defeating former Charleston County Council member Curtis Bostic in a primary runoff on Tuesday for the state's vacant 1st Congressional District seat.

The Associated Press called the race Tuesday evening with 67 percent of precincts reporting that Sanford had a combined 55 percent of the vote to Bostic's 45 percent.

The win was not unexpected for Sanford, who outraised Bostic more than 15-1 in the pre-runoff period and was able to blanket the airwaves, building on his nearly universal name recognition in the district he represented in Congress for three terms in the 1990s. Bostic, meanwhile, works in the district, but lives just outside its boundaries.

Bostic nevertheless built a strong coalition, drawing heavily on his ties to the evangelical Christian and home-schooling communities, and highlighting his family values in the hopes of attracting voters concerned about the affair that nearly ended Sanford's political career in 2009.

Sanford has come a long way in just the four years since he admitted to having an affair with Argentinian reporter Mar?a Bel?n Chapur, seeming to end a 16-year political career that had him on many short lists for the presidency. In 2009, during his second term as governor, Sanford disappeared for six days, telling his staff, who then passed off the story to the press, that he was hiking the Appalachian Trail. As he later revealed in a lengthy, awkward press conference, he had in fact been in Argentina with Chapur, to whom he is now engaged.

Sanford served out the rest of his term, leaving office in 2011, despite a censure by the state House and several failed attempts by the General Assembly to impeach him. He stayed largely out of the public eye until then-Rep. Tim Scott, another Republican, was appointed to the Senate in January, vacating Sanford's old seat.

Though neither Sanford nor Bostic has mentioned the affair directly during the campaign, it has hung over the special election, with Bostic emphasizing his family and Sanford invoking a "God of second chances" in his first television ad and on the campaign trail.

Sanford will go on to face Elizabeth Colbert Busch, the Democratic nominee, in the special election on May 7. Though the district is heavily Republican and has not elected a Democrat since the 1970s, Democrats are optimistic about Colbert Busch's chances, particularly given an internal poll she released on Monday showing her with a marginal lead in a race against Sanford.

Her brother's celebrity doesn't hurt either. Comedian Stephen Colbert has mentioned his sister (who pronounces the T in her surname) on his Comedy Central show and has already held two events for her, helping Colbert Busch keep pace with Sanford in fundraising so far. Colbert, the faux TV pundit, will reportedly hold two more high-priced events for her this month. Colbert Busch will also likely have the help of national Democratic groups eager to start off the next election cycle with a red-state victory.

But Colbert Busch hasn't faced much opposition thus far, sailing to victory in a Democratic primary against an underfunded candidate as Republicans have spent the last three months slowly whittling down a 16-candidate field. With Sanford as their nominee, focus will now shift to Colbert Busch, who has thus far been able to present a largely uncontested image of herself as a fiscally conservative job creator.

That spotlight already began to shift on Monday night, when the Sunlight Foundation reported that Colbert Busch's campaign had wiped more than 500 tweets from her account. Many were innocuous, and Colbert Busch's campaign explained that they were trying to clean up the account to make it easier for voters to find important information. But some of the tweets, including one that indicated her support for same-sex marriage and reproductive choice, represent the difficult balance she'll have to strike over the next five weeks between exciting Democrats in the district and attracting the Republicans and independents she'll need to remain competitive.

Source: http://news.yahoo.com/mark-sanford-wins-c-runoff-colbert-busch-still-214501075--politics.html

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Citing health, Meatloaf says he'll quit touring

Keystone / Getty Images

By Reuters

After more than 35 years of touring, American rocker Meat Loaf is quitting the road.?Meat Loaf, whose 1977 "Bat Out Of Hell" remains one of the biggest selling albums, said his "Last At Bat" tour starting in Britain this week and heading through Europe, would be his last, after struggling with health problems in recent years.

While other aging rockers like the Rolling Stones are returning to the lucrative tour circuit, Meat Loaf said he has had enough.

"This is really it ... I just don't want to travel anymore," the portly singer told Reuters TV in an interview before his tour through Britain, Germany and the Netherlands.

"I outweigh (Mick) Jagger by about 100 pounds?and that counts for something. He hasn't seen the wear and tear."

Meat Loaf, whose real name is Marvin Lee Aday, cancelled a European Tour in 2007 after being diagnosed with a cyst on his vocal chords, saying he received some "vicious" reaction to this.

He then sparked further fears for his health in 2011 when he collapsed on stage. He later blamed the blackouts on past concussion injuries and his health issues on asthma.

Last year he underwent a knee replacement operation from which he is still recovering and is due to have an operation on his other knee shortly.

Meat Loaf said his health was "fine" but it was important to be able to perform to your best.

"When your name is on the marque, you either get the glory or you get the hits," said the rocker, dressed all in black, who has also appeared in a list of movies, including cult classic "The Rocky Horror Picture Show."

"Over the years, a lot of stones and a lot of arrows have been flying my way. You expect that."

In the "Last at Bat" tour, Meat Loaf will perform his greatest hits in the first half of the show such as "Dead Ringer for Love" and "I'd Lie For You."

In the second half he will perform, in order, the seven songs from his "Bat Out Of Hell" album which has sold around 45 million copies to date.

Meat Loaf did not rule out performing live again, such as in Las Vegas, particularly after releasing his 13th album, "Brave and Crazy", that is currently in the pipeline.

The rocker said he was working on this album with Jim Steinman, the reclusive producer and songwriter behind his biggest hits with whom he last worked on his 1993 album "Bat Out of Hell II: Back into Hell."

But Meat Loaf cautioned fans that if he cried while singing "Crying Out Loud", the closing song of "Bat Out Of Hell" while on tour, this was not due to sadness at quitting touring.

"Even in rehearsal when I go to sing it I start crying so it's not like when you see me in the show and I am crying it's like "oh I bet he...." I would do it in rehearsal, I can't help myself," he said.

Related content:

Copyright 2013 Thomson Reuters. Click for restrictions.

Source: http://entertainment.nbcnews.com/_news/2013/04/02/17567270-meatloaf-announces-hes-quitting-touring-citing-health-concerns?lite

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