A helicopter carrying Chief of Staff plummeted before engine was restarted * The Sikorsky Black Hawk helicopters have been in operational use since the mid-90s.
Jordanian army members participate in a hostage rescue drill during a Black Hawk helicopters handover ceremony to Jordan from the U.S. government, at a Jordanian military base near the town of Zarqa, Jordan, January 28, 2018.(photo credit: REUTERS/STRINGER)ByANNA AHRONHEIM
