U.S. Air Force Staff Sgt. Douglas Kost, trombone player for New Harmony Air Force Band of Flight, attached to Operation Continuing Promise 2010 (CP10), performs at a medical site in Port-de Paix, Haiti, Aug. 1, 2010, for Haitians waiting in line to receive medical care. CP10 is a collaborative effort that involves military and civilian personnel providing humanitarian assistance and disaster relief to the Caribbean, Central and South America.