suggests emergency rescue teams failed to rescue this young girl who was very much alive when they arrived. this chicago video up close of the burning fuselage is shocking the family of one crash victim. >> stop! stop! stop! there is a body -- there is a body right there, right in front of you. >> reporter: investigators say that body 16-year-old ye mong who the san francisco medical examiner says was still alive at that moment. surviving the crash, she somehow managed to escape the aircraft and came to rest in this grassy area. within minutes, firefighters arrive on the scene and you can see them walking by her, even waving a fire truck around her. but not a single fire fighter stops to check her pulse or see if she was breathing. >> at least five fire fighters who saw her and understood she