ROBINS AIR FORCE BASE, Ga. -- On Sept. 29, 1969, the Warner Robins Air Materiel Area completed its C-123 aircraft modification program with the departure of the last 183 aircraft to Vietnam. These C-123K aircraft were modified with two J-85-17 jet engines, an anti-skid brake system, a stall warning system and shatterproof windshields. The new Ks played a major role in theater cargo/transport throughout the war.