Multiple people are feared to have died after two United States Army Black Hawk helicopters collided during a routine training exercise in Kentucky. They are based at Fort Campbell, situated on the state's border with Tennessee, 60 miles north west of Nashville. Nondice Thurman, a spokesman for Fort Campbell, confirmed the crashes happened before 10pm on Wednesday in Trigg County, near Highway 68. The HH-60 Black Hawk helicopter The HH-60 is a variant of the Black Hawk helicopter designed to provide support for various military operations. The HH-60 Black Hawk helicopter is estimated to cost around $10.2 million, according to Executive Flyers.