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.
(Images from Wikimedia Commons)
(before)
(after)
(video)
Operation Doorstep | The Spirit Photographs of William Hope | The Maps of Piri Reis | Dr Julius Neubronner's Miniature Pigeon Camera |
Art in Art | Huexotzinco Codex | Sessions for the Blind at Sunderland Museum |