WASHINGTON, DC - MARCH 23: U.S. President Donald Trump holds a listening session on health care with truckers and CEOs from the American Trucking Associations in the Cabinet Room at the White House on March 23, 2017 in Washington, DC.. (Photo by Molly Riley-Pool/Getty Images)
Students at a Brooklyn middle school have a 'duck and cover' practice drill in preparation for a nuclear attack; silver print, 1962. From the New York World-Telegram archive. (Photo by GraphicaArtis/Getty Images)
JUPITER, FL - MARCH 08: Republican presidential candidate Donald Trump holds up his book after holding a press conference at the Trump National Golf Club Jupiter on March 8, 2016 in Jupiter, Florida. Trump is projected to win the Republican Presidential primaries in Mississippi and Michigan. (Photo by Joe Raedle/Getty Images)
