Nine soldiers were killed in a crash of two medical evacuation Black Hawk helicopters during a routine nighttime training mission over Kentucky.
The U.S. Army said it is one of the military’s deadliest training accidents in recent years.
Crew members using night-vision goggles were flying two HH-60 Black Hawk helicopters, operated by the Army’s 101st Airborne Division, when the aircraft crashed in a field late over Kentucky’s Trigg County.
Army Brigadier General John Lubas, said little was known so far about why the helicopters came down.