Medical workers stage in the intersection of Tropicana Avenue and Las Vegas Boulevard South after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas, Nevada, US, early October 2, 2017. [Photo/Agencies]
A pair of cowboy boots is shown in the street outside the concert venue after a mass shooting at a music festival on the Las Vegas Strip in Las Vegas, Nevada, US, October 1, 2017. [Photo/Agencies]
US President Donald Trump makes a statement on the mass shooting in Las Vegas in front of a portrait of President George Washington in the Diplomatic Room at the White House in Washington, US, October 2, 2017. [Photo/Agencies]
A man holds a white rose outside a police perimeter near the scene of the Route 91 music festival mass shooting in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
US President Donald Trump, US first lady Melania Trump, US Vice President Mike Pence and his wife Karen Pence stand for a moment of silence in the wake of a mass shooting in Las Vegas at the White House in Washington, US, October 2, 2017. [Photo/Agencies]
US President Donald Trump stands with first lady Melania Trump and Vice President Mike Pence during a moment of silence in the wake of the the mass shooting in Las Vegas at the White House in Washington, US, October 2, 2017. [Photo/Agencies]
Debris is seen on the street near the site of the Route 91 music festival mass shooting outside the Mandalay Bay Resort and Casino in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
Red roses sit in a vase near the scene of a mass shooting at the Route 91 Festival in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
The US flag flies at half-staff in the wake of a mass shooting in Las Vegas at the White House in Washington, US, October 2, 2017. [Photo/Agencies]
People enter the Family Assistance Center set up in the Las Vegas Convention Center, following the mass shooting at the Route 91 music festival in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
A sign giving condolences for the victims of the Route 91 music festival mass shooting appears on the MGM Grand sign in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
Hundreds of people queue to donate blood following the mass shooting at the Route 91 music festival in Las Vegas, Nevada, US, October 2, 2017. [Photo/Agencies]
