Complete destruction of House No. 1, located 3,500 feet from ground zero, by an atomic blast on March 17, 1953, at Yucca Flat at the Nevada Proving Ground. The time from the first to last picture was 2.3 seconds. The camera was completely enclosed in a 2-inch lead sheath as a protection against radiation. The only source of light was that from the bomb. In frame 1, the house is lit by the blast. By frame 2 the radiating energy has set it on fire, and the remaining frames show the rapid disintegration of the house by the blast wave.