Question: What short lived aircraft, produced for the United States Air Force, is based on a fighter plane armed with four 20 mm cannons?
Sentence (from "Hiram Mann"): Hiram Mann (May 23, 1921 – May 17, 2014) was an American aviator, retired lieutenant colonel in the United States Air Force, and member of the Tuskegee Airmen's 332nd Fighter Group, an elite squadron of African-American airmen during World War II.
Relevant evidence: No