Police in Las Vegas, Nevada say a man opened fire on a country music concert late Sunday, killing at least 50 people and wounding more than 400 others. It is the deadliest mass shooting in U.S. history.
Las Vegas Shooting

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The grounds are shown at the Route 91 Harvest festival, with the Mandalay Bay Hotel behind the stage, on Las Vegas Boulevard South in Las Vegas, Nevada, Oct. 1, 2017.

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People seek shelter at the Route 91 Harvest country music festival after gun fire was heard on October 1, 2017 in Las Vegas, Nevada.

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People run from the Route 91 Harvest country music festival after gun fire was heard on October 1, 2017 in Las Vegas, Nevada.

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People take care of the wounded outside the Route 91 Harvest Country music festival grounds after a shooting on Oct. 1, 2017 in Las Vegas, Nevada.