Secretary of Defense Donald H. Rumsfeld responds to a reporter's question during a Pentagon news briefing on Feb. 28, 2003. Rumsfeld commented on the difficulty in predicting the numbers of troops that might be required to occupy and maintain order in a post-war Iraq. Chairman of the Joint Chiefs of Staff Gen. Richard B. Myers, U.S. Air Force, joined Rumsfeld at the briefing to give reporters an operational update.