Witnesses testified about reported findings of weapons of mass destruction in Iraq, including a recent report of 500 munitions containing serin and mustard gas. Defense Department officials and weapons experts talked about a recently declassified 2006 defense agency report. Topics included the danger from weapons dating back to the 1980s and the 2003 congressional decision to go to war in Iraq. A closed session of the committee was held later in the day to hear classified testimony.