North American F-82 Twin Mustang
This seems like the Siamese twins of aircraft. The United States Air Force designed the piston engine F-82 Twin Mustang as a long range escort for bombing missions. The Twin Mustang is essentially two P-51 Mustangs combined together. The Air Force conceived the aircraft concept during World War II, but didn’t complete its development until after the war concluded. The Air Force used some radar-equipped Twin Mustangs as all-weather interceptors. The Twin Mustangs gunned down the first three North Korean aircraft for the United States in the Korean War. The United States built 272 Twin Mustangs at a cost of $215,154 per aircraft. The Twin Mustang retired in 1953.