It was the F-82 Twin Mustang, developed as a long range escort towards the end of WWII. It didn’t see action in that war, but did go operational, and IIRC, scored the first air-to-air kill in Korea.
18 posted on 07/26/2014 7:43:06 PM PDT by Joe 6-pack
(Qui me amat, amat et canem meum.)