Department of Energy
XX-39 CLIMAX, part of Operation Upshot/Knothole, was a 61 kiloton device fired June 4, 1953 at the Nevada Test Site.
Until recently, records of Las Vegas's history with nuclear testing existed mainly in dusty archives and scattered around the glassy surface of the Nevada Test Site north of the city. But a few months, ago, The Atomic Testing Museum opened to tell the story of the United States entry into the nuclear age, and the city's specific role.
Troy Wade, chairman of the Nevada Test Site Historical Foundation; president of the Atomic Testing Museum