The AP reports that Stephen Colbert arrived in Iraq today. He will broadcast four episodes of The Colbert Report from Baghdad next week. The comedian had been promoting the trip on his show, but because of caution from the military had been saying only that he was going to the Persian Gulf. (On May 29, Alaska Gov. Sarah Palin announced on her Twitter page that she was taping a greeting to the troops for the episodes.) The shows will be taped in front of an audience of troops. It’s the first-ever broadcast from Iraq for a USO tour.