Operation Doorstep was a Civil Defense test carried out in conjunction with the much larger March 17, 1953, 16-kiloton ANNIE test conducted at the Nevada Test Site, part of Operation Upshot-Knothole. In the smaller Operation Doorstep test, blast and thermal effects were evaluated on mannequins, automobiles, and wooden frame houses.
Housed at: Wikimedia Commons | From: U.S. Department of Energy Digital Archive
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BEFORE THE BLAST
AFTER THE BLAST
