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Operation Doorstep (1953)

Operation Doorstep was a Civil Defense test from 1953 in which blast and thermal effects were evaluated on mannequins, automobiles, and wooden frame houses….more

The majority of the digital copies featured are in the public domain or under an open license all over the world, however, some works may not be so in all jurisdictions. On each Collections post we’ve done our best to indicate which rights we think apply, so please do check and look into more detail where necessary, before reusing. All articles published under a Creative Commons Attribution-ShareAlike 3.0 license. Strong Freedom in the Zone.

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