Soldiers from the 2nd Combat Aviation Brigade at Camp Humphreys, South Korea, receive a safety briefing from Staff Sgt. Lacarvia Heart Sept. 9, 2009, before off-loading three new upgraded Block II AH-64D Apache Longbow helicopters from a C-17 Globemaster III at Osan Air Base, South Korea. These helicopters are the first of 24 that Army officials are swapping for older Block I models over the next four months. Sergeant Heart is assigned to the 731st Air Mobility Squadron here. (U.S. Air Force photo/Staff Sgt. Brian Ferguson)