BERLIN, GERMANY - JANUARY 13:  A student naps in a lecture hall at the Freie Universitaet January 13, 2003 in Berlin, Germany. The German university system is facing cuts of EUR 75 million in state funding over the next four years as the German government pushes through financial reforms. German politicians are also deliberating whether to start making students pay for at least a portion of the costs of their university education, though the proposal has met with fierce resitance from students, who went on strike across Germany last month.   (Photo by Sean Gallup/Getty Images)

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    WASHINGTON, DC - SEPTEMBER 03: U.S. President Barack Obama waves to reporters after returning to the White House on board Marine One September 3, 2015 in Washington, DC. Obama spent three days in Alaska this week where he became the first sitting president to go to the Arctic Circle. (Photo by Chip Somodevilla/Getty Images)

    Obama approval rating hits new high

    President Barack Obama's approval rating stands at 55% according to a new CNN/ORC poll, matching his best at any time since his first year in office.
    14th April 1865:  John Wilkes Booth assassinating President Abraham at the Ford Theatre, Washington DC. From an edition of Harper's Weekly. Printed by Currier & Ives. Original Artwork: Printed by Currier & Ives.  (Photo by MPI/Getty Images)

    What if Abraham Lincoln had lived?

    Might the Civil Rights movement emerged decades sooner? Lincoln historian Harold Holzer offers his thoughts on what might have happened if Abraham Lincoln had lived.
    1960:  Republican presidential candidate Vice-President Richard Nixon (1913 -1994) laughing as he poses in front of the stars and stripes.  (Photo by Keystone/Getty Images)

    What if Richard Nixon never resigned?

    Is it possible that Ronald Reagan might not have been president? Historian Timothy Naftali explores what might have happened if Nixon hadn't resigned.
    An engraved illustration of The Burr?Hamilton duel, this was a duel between two prominent American politicians, the former Secretary of the Treasury Alexander Hamilton and sitting Vice President Aaron Burr, on July 11 1804  (Photo by Kean Collection/Getty Images)

    What if Alexander Hamilton had lived?

    Would slavery have been abolished decades sooner? Could the Civil War have been avoided? Historian Thomas Fleming looks at what might have happened if Hamilton had lived.
    Donald Trump Nevada rally

    Donald Trump praises Pence, takes credit

    Donald Trump applauded his running mate Mike Pence following the vice presidential debate and also looked to take some credit for Pence's well-received performance.

    Trump's rocky 1990s business dealings

    Back in 1990, trouble with Donald Trump's empire dominated an episode of Larry King Live. A year later, Trump went on the show to tell Larry he had survived the financial storm. Take a walk down memory lane and a peek into CNN's archives.