And former vice president Dick Cheney has been publicly heckled at an unlikely venue: the annual Conservative Political Action Conference in Washington, D.C. On Thursday, Cheney appeared at CPAC to grant a “Defending the Constitution” award to former Defense Secretary Donald Rumsfeld. After taking the stage to the pop music hit “Simply the Best,” Cheney was met with shouts of “war criminal” and “where’s bin Laden?” The heckles appeared to come from a contingent of supporters of libertarian Republican Ron Paul. The Paul group walked out of the room as Cheney began to speak.