Research at the National Archives, Mannequins and real people.

The more I search for details on the mannequins the more the realities begin to blur. Coordinated operations, in which mannequins were carefully dressed and typical social and domestic scenes were staged, began as isolated test scenarios at the Nevada Test Site in 1953. Extending beyond the boundaries of the NTS across the nation, their story culminates in Operation Alert, in which responses to nuclear attack were simulated by real individuals. Here are few images of mannequins and real people:

(Images courtesy of the U.S. National Archives and Records Administration)