Most medical schools have cut down on students' interactions with the pharmaceutical industry by instituting gift restriction policies. These policies can reduce the prescribing of newly marketed drugs in favor of cheaper options.

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The jobless rate was 7.9 percent vs. 7.8 percent in December. But new data show job growth has been better than first thought and ended 2012 on a strong note. Overall, it's estimated that several hundred thousand more jobs were created in 2011 and 2012 than previously thought.

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A 5-year-old boy has been held captive in an underground bunker since Tuesday. Authorities continue to negotiate with his captor. The child's bus driver was killed before the kidnapping. His sister says Charles Poland, "would have done anything to protect those kids."

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Rescuers continue to search the rubble at the headquarters of Mexico's state-owned oil company, where several floors were damaged. The blast's cause has not yet been determined.

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News outlets say one or two people were reportedly killed by the Friday blast. The cause is not yet confirmed, but there are reports that it may have been the work of a suicide bomber. The State Department calls it a "terrorist blast."

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The three-term former mayor, who led the city out of its financial crisis in the late '70s, was 88. Known for asking "hey, how'm I doing?" he was sometimes too candid for his own political good. But when the city needed a lift, he was everywhere. He thought it needed a big personality — his.

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New York was practically falling apart in 1977 when Koch first ran for mayor, but he created a feeling the city could come back. His larger-than-life personality was well-suited to the nation's biggest city but could also get him in trouble. A spokesman says Koch died early Friday. He was 88.

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New York was practically falling apart in 1977 when Koch first ran for mayor, but he created a feeling the city could come back. His larger-than-life personality was well-suited to the nation's biggest city but could also get him in trouble. A spokesman says Koch died early Friday. He was 88.

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Hillary Clinton ends her tenure as secretary of state Friday a respected national figure with sky high approval ratings. "I don't see myself getting back into politics," she says. But that hasn't slowed speculation about a 2016 presidential bid.

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Hillary Clinton ends her tenure as secretary of state Friday a respected national figure with sky high approval ratings. "I don't see myself getting back into politics," she says. But that hasn't slowed speculation about a 2016 presidential bid.

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The largest railroad terminal in the world opened its doors for the first time in 1913. And while Grand Central Terminal, in the heart of New York City, no longer serves long-distance trains, it is still a vibrant part of the city's ecosystem.

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The years-long, multi-billion-dollar battle just ended.

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Watch Richard II with Derek Jacobi on PBS. See more from Shakespeare Uncovered.

Derek Jacobi returns to a role he played 30 years ago, coaches actors at the Globe in aspects of the play, reveals why it could have cost Shakespeare his life — and shares some of the extraordinary modern political parallels within the play that still resonate as dictators are deposed. Also featured are notable excerpts from the upcoming GREAT PERFORMANCES film adaptation starring Ben Whishaw and Patrick Stewart.

• Friday 2/1 @ 9:30 p.m.

Watch Henry IV & V with Jeremy Irons on PBS. See more from Shakespeare Uncovered.

Jeremy Irons (who stars as Henry IV in the upcoming new GREAT PERFORMANCES film adaptation) uncovers the enduring appeal of Shakespeare’s “history plays,” from the facts of English history to the father-son drama that Shakespeare created. He discloses what Shakespeare’s sources were — and how he distorted them. He invites the viewer behind the scenes at the filming of some of the most important sequences in the new GREAT PERFORMANCES adaptations of both plays, starring Irons, with Tom Hiddleston as Prince Hal.

• Friday 2/1 @ 10:30 p.m.