http://avimilclub.webs.com/ The Northrop P-61 Black Widow was the first operational U.S. military aircraft designed specifically to use radar. The "Black Widow" was an all-metal, twin-engine, twin-boom, aircraft flown as a night-fighter by United States Army Air Forces squadrons in the European Theater, the Pacific Theater, the CBI Theater, and the Mediterranean Theater during World War II. It replaced earlier British-designed night-fighter aircraft that had been updated to incorporate radar when it became available. On the night of 14 August 1945, a P-61B-2 of the 548th NFS named "Lady in the Dark" was unofficially credited with the last allied air victory before VJ Day. The P-61 was also modified to create the F-15 Reporter, the last piston-powered photo-reconnaissance aircraft designed and produced for the U.S. Air Force.