A U.S. Marine taxis down the flightline in an AV-8B Harrier II during Lt. Col. Keith Bucklew’s last flight as commanding officer of Marine Attack Squadron 311 at Marine Corps Air Station Yuma, Ariz., Oct. 14. - A U.S. Marine taxis down the flightline in an AV-8B Harrier II during Lt. Col. Keith Bucklew’s last flight as commanding officer of Marine Attack Squadron 311 at Marine Corps Air Station Yuma, Ariz., Oct. 14.