"The North American F-82 Twin Mustang was the last American piston-engine fighter ordered into production by the United States Air Force. Based on the P-51 Mustang, the F-82 was originally designed as a long-range escort fighter in World War II, however the war ended well before the first production units were operational, so its postwar role changed to that of night-fighting."
WIKI..."However the War ENDED BEFORE the first [production units were available"
