Description:Within days of the final U.S. troop withdrawal from Iraq, government authorities issue an arrest warrant for Sunni Muslim Vice-President Tareq al-Hashemi. He is suspected of ties to assassinations and bombings, but defended himself at a news conference Tuesday. The political struggle between Shi'ite Prime Minister Nuri al-Maliki and his Sunni rivals in the country's delicate power-sharing deal has intensified during the withdrawal of the last U.S. troops.(3:19)