A US Marine Corps (USMC) Crew CHIEF aboard a CH-53E Super Stallion helicopter scans for obstacles prior to take off at the Freetown International Airport, while deployed with the 398th Air Expeditionary Group (AEG) to provide personnel recovery and emergency evacuation capability for the Humanitarian Assistance Survey Team (HAST) and the Fleet Anti-terrorism Security Team (FAST), at Lungi, Sierra Leone, in support of Joint Task Force (JTF) Liberia