Slideshow: American air arsenal of 1941

Martin B-10

Dubbed by Gen. Henry H. “Hap” Arnold “the air power wonder of the day,” the B-10 was so incredible that it rendered all previous bombers obsolete and was also faster than any fighter in the air when it entered service in 1933. This revolutionary bomber featured a rotating turret, internal bomb bay, retractable landing gear and enclosed cockpit, which would be the standard for subsequent bombers. Like the Hawk, multiple nations operated the B-10. The Dutch used B-10s over Singapore and the Dutch East Indies and the Chinese actually flew B-10s over Japan to drop propaganda leaflets. The bomber carried a crew of four (pilot, co-pilot, and two gunners), could cruise just under 200 miles per hour, had a 1,200-mile range, and could carry 2,260 lbs. of bombs.