The Federal Aviation Administration on Monday announced it is opening an investigation after several drones collided and fell from the sky over the weekend at an Orlando holiday show, injuring one person. The Saturday-night event in Lake Eola Park ended early when several drones plunged into the large crowd of onlookers. WESH reported that the person injured was a 7-year-old boy, who reportedly had to have emergency open-heart surgery on Sunday after being struck in the face and chest by a drone.