UPDATED: Las Vegas cops: Gunman from 32nd hotel floor opens fire on country music fans at outdoor concert; at least 58 killed, surpassing Orlando's Pulse shooting massacre
ORLANDO, Fla. -- Fifteen months after the Pulse nightclub massacre here in Orlando, a lone gunman overnight in Las Vegas opened fire from a 32nd floor balcony of the Mandalay Bay Resort and Casino into the crowd at an outdoor country music concert during a closing performance by Jason Aldean, killing at least 58 and injuring 500-plus others.