The XX-34 BADGER explosion on April 18, 1953, as part of Operation Upshot-Knothole, at the Nevada Test Site.
The photo is from the Department of Energy, Nevada Site Office's Photo Library - Atmospheric, specifically XX34.JPG.
Alternative source: http://www.nv.doe.gov/library/photos/photodetails.aspx?ID=1048
As seguintes páginas apontam para este ficheiro: