President Donald Trump and first lady Melania Trump participate in a moment of silence honoring the victims of the Sept. 11 terrorist attacks, on the

President Donald Trump and first lady Melania Trump participate in a moment of silence honoring the victims of the Sept. 11 terrorist attacks, on the South Lawn of the White House, Wednesday, Sept. 11, 2019, in Washington. (AP Photo/Evan Vucci)

President Donald Trump and first lady Melania Trump participate in a moment of silence honoring the victims of the Sept. 11 terrorist attacks, on the South Lawn of the White House, Wednesday, Sept. 11, 2019, in Washington. (AP Photo/Evan Vucci)