Explosions of fuel tanks of civilian helicopters — including air ambulances and police choppers — have led to dozens of deaths since 1994, according to a new investigation. Watch the report from NBC News' Tom Costello:
Outdated Fuel Tanks in Civilian Helicopters Pose Potential Dangers
Explosions of fuel tanks of civilian helicopters, including air ambulances and police choppers, have led to dozens of deaths, an investigation finds.