A gunman killed 50 people in an Orlando, Florida, nightclub early Sunday morning and wounded dozens more before police stormed the building.
50 Dead in Worst Mass Shooting in US History

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Jermaine Towns, left, and Brandon Shuford wait down the street from a multiple shooting at a nightclub in Orlando, Fla., Sunday, June 12, 2016. Towns said his brother was in the club at the time. (AP Photo/Phelan M. Ebenhack)

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Orlando Police Chief John Mina and other city officials answer the media's questions about the Pulse nightclub shooting in Orlando, Florida, June 12, 2016.

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Officers arrive at Orlando Police Headquarters during the investigation of a shooting at the Pulse nightclub, Orlando, Florida, June 12, 2016.

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Orlando Mayor Buddy Dyer, center right, and Orlando Police Chief John Mina, center left, arrive to a news conference after a fatal shooting at Pulse Orlando nightclub in Orlando, Fla., June 12, 2016.