This was the second of three F-107 a/c built. It was the only one fitted with the four 20mm M39 cannon armament, and was used for weapons testing. The F-107 program ended in March 1957 and this a/c was flown to the USAF Museum on 25 November 1957. This slide was taken in the outdoor aircraft display area at the old museum on Patterson AFB. The a/c is still at the current museum but as of May 2022 is in storage and not on display.