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A Secret Service agent offstage watches as President Barack Obama speaks during a Las Vegas fundraiser for Sen. Harry Reid at Caesars Palace on May 26, 2009. (Credit: Official White House photo by Pete Souza)

A Secret Service agent offstage watches as President Barack Obama speaks during a Las Vegas fundraiser for Sen. Harry Reid at Caesars Palace on May 26, 2009 (Credit: Official White House photo by Pete Souza)