A KB-50 Superfortress of the 622nd Air Refueling Squadron carrying out the first triple-point refueling operation with three F-100C Super Sabres of the 451st Tactical Fighter Squadron. 1956. Boeing B-KB50D Superfortress 48-123 of Air Proving Ground Command carrying out first triple-point refuelling operation with three North American F-100C Super Sabres (54-1825, 53-1774, 54-1848) of the 451st Fighter Day Squadron (322d FDG), 1956.