Air Force Capt. Mark Lyerly, Air Mobility Command Test and Evaluation Squadron C-130 instructor navigator, Joint Base McGuire-Dix-Lakehurst, N.J., shares his aerial delivery systems experience with Cameroon Air Force personnel during Central Accord 2013, at Douala Air Force Base, Douala, Cameroon, February 21, 2013. Lyerly of Niceville, Fla., is participating in Central Accord 2013, a joint exercise in which U.S., Cameroon and neighboring Central African militaries partner to promote regional cooperation while and increasing aerial resupply and medical readiness capacity. (U.S. Air Force photo/Master Sgt. Stan Parker)