Northrop F-89J Scorpion 52-2547 fires a live MB-1 rocket during Operation Plumbbob John, 19 July 1957 at NTS Area 10 Published on July 19, 2012 in 19 July 1957, 14:00:04.6 UTCFull resolution (493 × 302) ← Previous Next → Northrop F-89J Scorpion 53-2547 fires a live MB-1 rocket during Operation Plumbbob John, at NTS Area 10, 1400 GMT, 19 July 1957. (U.S. Air Force)