A late-night Frontier Airlines flight bound for Los Angeles turned into a mass emergency evacuation after the aircraft struck and killed a man who had breached security and entered a runway at Denver International Airport. Authorities have since ruled the death a suicide. According to The New York Post , Frontier Flight 4345 was preparing for takeoff around 11 p.m. on Friday, May 8, when the Airbus A321 accelerated down the runway and collided with a 41-year-old man later identified as Michael Mott. Air traffic control audio captured the pilot informing the tower moments later: “We just hit somebody,” before reporting an engine fire and bringing the plane to a stop. Smoke quickly filled parts of the cabin as passengers prepared to evacuate using inflatable emergency slides. Authorities said all 224 passengers and seven crew members made it off the aircraft safely, though 12 passengers suffered minor injuries during the evacuation and five were transported to nearby hospitals.…