WASHINGTON, DC - AUGUST 09:  A fallout shelter sign still hangs near the entrance to the old Bruce Elementary School which is now called the Cesar Chavez Prep Middle School, on August 9, 2017 in Washington, DC. In the early 60's Washington was at the center of civil defense preparations in case of a nuclear blast, with over one thousand dedicated public fallout shelters in schools, churches and government buildings.  (Photo by Mark Wilson/Getty Images)
Mark Wilson via Getty Images
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