US flags were lowered to half-staff after the Las Vegas shooting

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U.S. flags on the grounds of the Washington Monument are lowered to half-staff, on October 2, 2017 in Washington, DC. President Donald Trump ordered the flags on all federal buildings to fly at half-staff following the mass shooting that left more than 50 dead in Las Vegas.

AP Photo/Susan Walsh

With the flag flying at half staff for the victims of the Las Vegas shootings, former Rep. Gabrielle Giffords, D-Ariz., right, shakes her fist at the United States Capitol as she and her husband Mark Kelly, left, speak on Capitol Hill in Washington, Monday, Oct. 2, 2017, about the mass shooting in Las Vegas.

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An American flag flies at half-staff at the U.S. Capitol, on October 2, 2017 in Washington, DC.

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Tourists pose for photographs as the U.S. flag flies at half-staff over the White House October 2, 2017 in Washington, DC.