Newly obtained surveillance video shows a trespasser entering an active runway at Denver International before getting hit by a Frontier plane taking off for Los Angeles. The airport says they’re working to “perform an incident analysis which will include reviewing the perimeter security program.” The plane evacuation is also under scrutiny after some passengers on board describe having to wait several minutes in the smoky cabin after impact. NBC’s Liz Kreutz reports for TODAY. Warning: Some may find the surveillance video disturbing.