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Breaking news tonight, an engine catching fire at Denver International Airport, forcing 172 passengers and

six crew members to evacuate. The evacuation seemingly so fast, passengers could be seen standing

on the wing of the plane as the smoke rose around them. What went wrong here? Well,

investigators at the FAA are working on trying to figure that thing out.

But here's what we do know.

American Airlines Flight 1006 departed Colorado Springs heading towards Dallas-Fort Worth.

The FAA says the crew reported some kind of engine vibrations, and the flight was quickly diverted to Denver.

It taxied to a gate, and that's when the engine caught fire.

You'd think this would have been an emergency situation, but air traffic control audio that we

have just been able to obtain shows the pilots weren't treating this like one. Listen.

...