U.S. Army Lt. Col. Allen Pepper, right, assigned to U.S. Army Africa, and Rawanda Defense Force (RDF) Lt. Col. Jean Paul Karangwa, an RDF battalion commander, exchange numbers after arriving in Bangui, Central African Republic (CAR), Jan. 16, 2014, aboard a U.S. Air Force C-17 Globemaster III aircraft. U.S. forces were dispatched to provide airlift assistance to multinational troops in support of an African Union effort to quell violence in the CAR.