Public fallout shelters were marked by distinctive signs. Directed by the Office of Civil Defense (OCD) and supervised by Naval Facilities Engineering Command (NAVFAC) and the US Army Corps of Engineers, work was done under contract by local architect-engineer firms. In December 1961 the US Department of Defense announced the initiation of the National Fallout Shelter Survey (NFSS) to identify, license, mark with distinctive signs, and stock with essential food and other supplies suitable public fallout shelter space in existing structures, mines, caves, and tunnels throughout the United States. These signs were never used, and have been in storage since they were made in the early 1960s. ![]() These original US fallout shelter signs are made of galvanised steel, painted in a flat, reflective paint.
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