Republican presidential hopeful Newt Gingrich, with his wife, Callista, delivers remarks Sunday during a rally with senior citizens at The Villages retirement community in Lady Lake, Fla. Paul J. Richards/AFP/Getty Images hide caption

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Gingrich's Other Opponent: Who Is Saul Alinsky?
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In California, prison inmates who have committed serious crimes and have been diagnosed with a major mental illness can be forced to serve their parole in a state hospital. At Atascadero State Hospital, shown above in this 1999 photo, there are more than 600 such patients. "As a group," says the hospital's director, "the mentally disordered offenders are the most aggressive." Reed Saxon/AP hide caption

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How Do You Hold Mentally Ill Offenders Accountable?
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Metropolitan State Hospital employees and supporters gathered outside the hospital in Norwalk, Calif., this summer to protest repeated assaults at the hands of mental patients, and what they called dangerous working conditions. Nick Ut/AP hide caption

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In Calif. Mental Hospitals, Assaults Rarely A Crime
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From left, GOP presidential candidates Newt Gingrich, Ron Paul, Rick Perry and Mitt Romney participate in the Fox News/Google GOP debate at the Orange County Convention Center in September. Since then, the candidates have gotten tougher on each other. Mark Wilson/Getty Images hide caption

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GOP Candidates Step Up Attacks On Each Other
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Eddie Murphy Is Out As 2012 Oscar Host
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An Inside Look At The 'Dark Art' Of Politics
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Expedition Looks For Crude In Sunken Oil Tanker
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Former Massachusetts Gov. Mitt Romney (left) and Texas Gov. Rick Perry got into a heated exchange about immigration during Tuesday's GOP presidential debate in Las Vegas.

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Conservatives On The Hunt For Mr. (Or Ms.) Right
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Herman Cain (left) watched as former Massachusetts Gov. Mitt Romney (center) and Texas Gov. Rick Perry spoke during what became a heated Republican presidential debate Tuesday night in Las Vegas.

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Gloves Come Off At GOP Debate In Las Vegas
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An unmanned ROV (remotely operated vehicle) is launched 900 feet underwater to study the wreckage of the SS Montebello.

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Six Miles Offshore: The Wreck Of Montebello
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New Jersey Gov. Chris Christie kept his fans guessing about whether he'll make a run for president during an appearance Tuesday night at the Ronald Reagan Presidential Library and Museum in Simi Valley, Calif. Kevork Djansezian/Getty Images hide caption

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Christie's Denials Don't Squelch Candidacy Rumors
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Political Ads Target TV, But Not Everyone Is Tuning In
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Republican presidential candidate Rep. Michele Bachmann arrives for a rally in Costa Mesa, Calif., on Friday. Chris Carlson/AP hide caption

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Can Michele Bachmann Get Her Groove Back?
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Treasurer Allegedly Embezzled From Calif. Democrats
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