People take cover at the Route 91 Harvest festival after a gunman opened fire on the festival from a room in the Mandalay Bay Resort and Casino in Las Vegas.

People take cover at the Route 91 Harvest festival after a gunman opened fire on the festival from a room in the Mandalay Bay Resort and Casino in Las Vegas.

People take cover at the Route 91 Harvest festival after a gunman opened fire on the festival from a room in the Mandalay Bay Resort and Casino in Las Vegas.

People take cover at the Route 91 Harvest festival after a gunman opened fire on the festival from a room in the Mandalay Bay Resort and Casino in Las Vegas.