Garrett Graff

A 150-megaton thermonuclear explosion at Bikini Atoll on Mar. 1, 1954. Courtesy UNO. (Photo by Ann Ronan Pictures/Print Collector/Getty Images)

Q & A: Garrett Graff on Trump, nukes and emergency planning

The U.S. government has an intricate plan to survive a nuclear war. In the Trump era, the blueprint might need an update