Four people killed when their helicopter crashed on a Maryland highway were returning from an event where they had given helicopter rides to raise money for troubled youth, authorities said Friday.
Investigators do not yet know why the helicopter crashed on Interstate 70 and burst into flames around 10:30 Thursday night, said Kitty Higgins, a National Transportation Safety Board member. No vehicles were hit and no one on the ground was hurt.
The pilot and two of the people on board were employees of Frederick, Maryland-based Advanced Helicopter Concepts. The fourth was a friend who had flown with them to Hagerstown for a meeting of the Advanced Helicopter Youth Foundation charity.
The pilot, ...