JOINT BASE LEWIS-MCCHORD, Wash. -- U.S. Air Force Lt. Col. Timothy Ober, commander of the 4th Airlift Squadron, assumes command from Col. Sergio Anaya, commander of the 62d Operations Group, during a change of command ceremony at Joint Base Lewis-McChord, Washington, March 27, 2023. Aircrews from the 4th AS operate the C-17 Globemaster III aircraft, directly supporting numerous U.S. government agencies and international forces in global operations ranging from troop airlift/airdrop to lifesaving medevac and humanitarian/disaster relief.