As he worked his way through the ranks , Greene 's assignments included platoon leader , company executive officer , and battalion staff officer , Fort Polk ; resident engineer in Athens ; project engineer in Istanbul ; brigade engineer and company commander , V Corps , West Germany ; staff officer and materials engineer , Army Aviation and Troop Command , St. Louis ; product manager , Aerial Common Sensor , Fort Monmouth ; and assistant director , Combat Developments Directorate , U.S. Army Maneuver Support Center , Fort Leonard Wood . At the time of the September 11 attacks in 2001 , he was stationed at Fort Leonard Wood
September 11 attacks
September 11 attacks
Harold J. Greene