In this video, the Arizona political leftwing radical mass slaughterer, Jared Loughner, is dressed up as a terrorist as he sets the American flag on fire. The song you hear is "Let the bodies hit the floor" by the Drowning Pool, the same song the US government used to an interrogation tool at GITMO.
Further, it is now official that Congresswoman Gabrielle Giffords was indeed the target. It bears noting that Giffords is the first Jewish congresswoman elected from that state (Atlas was one of the first to point that out early yesterday). One of Loughner's favorite books is Hitler's Mein Kampf.