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Republican presidential candidates are vying for the mantle of Reagan conservatism, but some observers say today's Republican Party is dramatically different than the one Ronald Reagan took charge of in the 1980s. So what exactly is a Reagan conservative? If he were alive, could Reagan still get the GOP nod?

Some people suffering from PTSD have recurring nightmares of a single, traumatic event. Researchers are focusing on a specific event during sleep that may be causing the disturbing dream cycle.

Sleep apnea is a condition that can raise the risk of several serious illnesses, including heart disease. Testing for the condition is a lucrative business, and sleep labs have sprung up across the country. But as spending skyrockets, insurers are rethinking how they pay for testing to curb costs.

The latest round of the NFL playoffs didn't disappoint. The Green Bay Packers, the team with the best record in the regular season, lost to the New York Giants. Among the other games, the New England Patriots beat the Denver Broncos.

Food twines its way through the history of the civil rights movement. Sit-ins at lunch counters helped galvanize the movement. Proceeds from bake sales supported bus boycotters; many of the customers were segregationists unaware they were making the movement they opposed stronger with every fancy cake they bought.

Former House Speaker Newt Gingrich has been so late to events that he's forced other speakers to stall. Rival Rick Santorum was at the same event on Friday, and he gladly used the time to work the crowd.

Those visiting the new memorial in Washington, D.C. will find a quote that reads: "I was a drum major for justice, peace and righteousness." But that's not exactly what the civil rights leader said. The Interior Department has decided to have the quote fixed.

Two more shows to add to your 2012 list: Justified, which returns to FX Tuesday night for its third season, and Alcatraz, a new Fox drama and the latest from Lost producer J.J. Abrams. TV critic David Bianculli explains why they're both worth watching.

The nation celebrates the birthday of Martin Luther King Jr. on Monday. As millions honor his legacy with a national day of service, we take a moment to reflect on his legacy with the original "I Have a Dream" speech, delivered on August 28, 1963, on the steps of the Lincoln Memorial.

The Supreme Court's 2010 Citizen's United ruling loosened campaign finance restrictions, enabling corporations to spend unlimited amounts of money on elections. As a result, super PACs — political action committees — can solicit large corporate contributions and produce a plethora of attack ad campaigns.