Martin B-57 Canberra

The Martin B-57 Canberra is an American-built twin-engined tactical bomber and reconnaissance aircraft, a license-built version of the British English Electric Canberra produced by the Glenn L. Martin Company for the United States Air Force, which it entered in 1953. The first Martin-built aircraft were virtually identical to the British originals, while later variants used more US-sourced components, and specialised reconnaissance and electronic warfare versions followed, including the high-altitude RB-57D. It was the first jet bomber in US service to drop bombs in combat, was used extensively in the Vietnam War and was flown by Pakistan in the 1965 and 1971 wars. The USAF retired the type in 1983, though NASA kept three WB-57F research aircraft flying.