Anderson Cooper asks Republican Rep. Dana Rohrabacher of California to provide evidence of his claim the president "knew this was a terrorist attack."
On Thursday, Washington lawmakers were briefed and watched "real-time" video of the deadly attack on the U.S. diplomatic compound in Benghazi, Libya.
Republican Rep. Dana Rohrabacher of California, who is a member of the House Foreign Affairs committee, questioned how President Barack Obama and his administration handled the message, in the days shortly after the attack on September 11, 2012, to the American people about who was responsible.
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