Keywords: Operation Plumbbob - Whitney.jpg en PLUMBBOB/WHITNEY - September 23 1957 - NEVADA TEST SITE -- The early cloud of WHITNEY Operation Plumbbob's 22nd atomic detonation retains an ionization glow minutes after detonation The mushroom cloud sheared cleanly from the stem before the cloud rose to about 30 000 feet http //www nv doe gov/library/photos/photodetails aspx ID 487 Photo courtesy of National Nuclear Security Administration / Nevada Site Office 1957-09-23 PD-USGov Plumbbob Whitney Images from the NNSA/NSO Photo Library |