Aug. 17, 2015 Charleston C-17s help paratroopers celebrate 75 years Reserve C-17 aircrews from Joint Base Charleston, S.C., took part in the 75th anniversary of the U.S. Army Airborne School here by dropping a group of Army paratroopers over Lawson Army Airfield.Aircrews from the 701st and 300th Airlift Squadron flew two C-17s during Fort Benning’s Aug. 15