A 41-year-old man who scaled a remote fence and walked onto a runway at Denver International Airport was intending to end his life when he was struck and killed by a departing aircraft, authorities confirmed on Tuesday. Sterling McLaren, the chief medical examiner for the city and county of Denver, stated that the cause of death was determined to be suicide following a post-mortem examination. No note was recovered, and further details were not provided. The collision, involving a Frontier Airlines plane, ignited an engine fire, necessitating the evacuation of passengers. Airport officials released black-and-white video footage showing a small figure, from a distance, walking with swaying arms toward the runway. An airport spokesperson said 12 people sustained minor injuries and five were taken to hospitals (AP Photo/David Zalubowski) In the footage, the person crosses onto the runway at a slight angle and seconds later the plane is seen speeding past.…