WASHINGTON, DC - SEPTEMBER 11:  U.S. President Donald Trump and first lady Melania Trump, flanked by White House staff, place their hands over their hearts on the South Lawn of the White House during the playing of "Taps" at a ceremony marking the September 11 attacks September 11, 2017 in Washington, DC. Today marks the 16th anniversary of the attacks that killed almost 3,000 people and wounded another 6,000.  (Photo by Win McNamee/Getty Images)