Keywords: Plumbbob Diablo 001.jpg Operation Plumbbob DIABLO Event - The DIABLO Event was detonated on 15 July 1957 at the Nevada Test Site from a 500 foot tower It had a yield of 17-kilotons 1037 XX-15 1957-07-15 Federal Government of the United States PD-USGov Plumbbob Diablo |