13h 44min, jun 12, 2016 y - 2016 jun 12
Omar Mateen killed 49 people in an Orlando, Florida gay nightclub, using an AR-15 semiautomatic rifle.
Description:
In a call to 911 he made during the attack, Mateen told police he had pledged his allegiance to the radical Islamic terrorist group ISIS.
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Timeline of guns in the US
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