The RB-66 reconnaissance aircraft and the B-66 medium bomber were the most advanced of their types in the United States Air Force when introduced in 1954 and 1955. In speed, range and capacity, the B-66 twin-jet with a three man crew met all tactical requirements for delivering the most potent weapons. The RB-66 was modified for use in night photo reconnaissance, electronics reconnaissance and weather reconnaissance. The B-66 "Destroyer" was developed from the Navy A-3D "Skywarrior" for USAF use as a tactical light bomber and photo reconnaissance aircraft, with production ending in 1958.