Gen. John Keane, U.S. Army, vice chief of staff, briefs Pentagon reporters on some of the proposed changes to the headquarters organization of the U.S. Army. The Dec. 18, 2001, briefing highlighted the efforts by both the Army and Air Force to comply with the management imperatives laid down in a speech made by Secretary of Defense Donald Rumsfeld on the day before the Sept. 11 terrorist attacks against the United States.