US transportation secretary: 'Late last night, a trespasser breached airport security at Denver Intl Airport, deliberately scaled a perimeter fence, and ran out onto a runway. The trespasser on the runway was then struck by Frontier Airlines Flight during takeoff at high speed. The pilot stopped takeoff procedures immediately. The Frontier plane was then quickly evacuated while law enforcement and firefighters responded. Preliminary reports are 12 people were hurt, with 5 taken to the hospital.'