Footage shows moments before Frontier Airlines jet struck person on Denver airport runway

Newly released surveillance footage shows the harrowing moment a Frontier Airlines jet struck and killed an individual who was loitering on the runway at Denver International Airport late Friday night. 

Thermal imaging on the clip obtained by KDVR shows the unidentified person scale a perimeter fence before walking directly into the airplane's path.

"The trespasser on the runway was then struck by Frontier Airlines Flight 4345 during takeoff at high speed. The pilot stopped takeoff...