Several major airlines are suspending a key safety program.

On the heels of this past weekend's Denver accident, during which a Continental 737 cracked open and burst into flames (fortunately all 110 passengers and five crewmembers aboard escaped; only 38 were injured), ABC News is looking into why some major airlines like American, Delta, US Airways and ComAir have suspended a key safety program. For more on this story, click here.