U.S. Air Force Maj. Jason Campbell, the chief engineer of NATO Training Mission Afghanistan's Regional Support Command Southwest, takes the oath of office from U.S. Army Col. Matt Redding, the commander of NTM-A RSC-SW, during a promotion ceremony at Camp Leatherneck, Helmand province, Afghanistan, March 30, 2012. Campbell's family and home unit watched via video teleconference from Charleston Air Force Base, S.C.