Firefighter helmet cam reveals how emergency teams failed to avoid 16-year-old Ye Meng Yuan Firefighter helmet-cam footage from the crash of Asiana Airlines Flight 214. HELMET-CAM footage from a firefighter responding to the crash of Asiana Airlines Flight 214 in San Francisco sheds new light on how a 16-year-old was killed by a fire truck. Ye Meng Yuan had survived the crash but was struck by at least one emergency response vehicle after she fled the burning aircraft. Three people died and 180 were injured when the aircraft slammed into the ground short of the runway on July 6. Fire trucks had sprayed the aircraft with fire-retardant foam and investigators believe the 16-year-old had been doused with the sticky white substance. The footage, obtained by the San Francisco Chronicle , shows how this may have made it harder for drivers to see her against the thick plumes of foam covering the runway. The helmet cam footage is being examined by investigators. The footage reportedly shows that emergency response firefighters believed Yuan was dead as she was laying, unmoving, in a foetal position on the ground. They did not appear to tell their supervisor, or truck drivers, that she was there. San Mateo County's coroner has found the teen was hit twice by emergency vehicles, and likely did not die until after the second impact. The San Francisco Chronicle has not released the full footage of the incident. Instead, it has published a series of stills taken from the video.