Transcript for Military Accident Caught on Tape
-- turn now -- the new video of the crash of a US Apache helicopter in Afghanistan. The crash happened last month but the video has just emerged. It's amazing no one was seriously injured and it is raising a lot of questions about what caused. The crash here's -- -- Again no one was seriously injured we're gonna bring in ABC's Martha Raddatz and every time you see that video market what are you hearing what's the latest -- what could possibly caused that. They're pretty incredible video a military official tells me this morning that investigators will look at what they call. Any factors behind the incident that sent an official way of saying what the heck were they doing. This is what they will concentrate on. A very low pass when the helicopter first comes into -- passing extremely -- As one official said yes we will look to see if they were showing off for those on the ground -- look the helicopter looked in control but it's when it banks up. That it appears to lose air speed and never get it back that is far more likely to happen at high altitudes where the air is thin. So they probably know that is what likely caused the crash. But they want to know why they were doing that in the first place -- and they could hear people laughing on the ground again no one was seriously injured on board or on the ground -- would Intel's -- little more about the condition -- the people that were there Martha. But what boats a helicopter minor lacerations on the face and a late injury but the people on the ground there were thirty people around there on the ground they have to run for their lives. And probably hundreds more at that combat out. No -- Martha thank you very much -- always.
This transcript has been automatically generated and may not be 100% accurate.