Ok, not THAT B-21, but the North American XB-21 Dragon, a 1936 prototype medium bomber. Innovative, but poor performance. Valuable experience for the B-25 - used by the Doolittle Raiders, the namesake for the modern B-21 Raider.
Ok, not THAT B-21, but the North American XB-21 Dragon, a 1936 prototype medium bomber. Innovative, but poor performance. Valuable experience for the B-25 - used by the Doolittle Raiders, the namesake for the modern B-21 Raider.