A U.S. Marine Corps CH-53E Super Stallion helicopter, Marine Heavy Helicopter Squadron 464 (HMH-464), descends to recover a British Merlin HC3 helicopter, during a Tactical Recovery of Aircraft and Personnel (TRAP) mission, undisclosed location, Helmand Province, Afghanistan, September 15, 2011. HMH-464 performs TRAP missions in order to retrieve U.S. and U.K. Armed Forces equipment and conduct investigations in support of International Security Assistance Force..