Three U.S. service members were also wounded and one U.S. civilian was killed in the ambush by a lone Islamic State member in central Syria.

The U.S. currently has hundreds of troops deployed in eastern Syria as part of a coalition fighting the Islamic State group.

The force has named satellites and ground systems after mythological creatures, ghosts and Norse pantheon, to name a few.

Following major mishaps, the military’s first tiltrotor aircraft program must take “immediate and decisive action” to avoid more loss, a review found.