The US Army has lost contact with one of its Shadow drones last Tuesday in Arizona. The 450 pound drone has a wingspan of 20 feet and can fly for eight to nine hours without refueling. The Army’s 14th Brigade Engineer Battalion from Joint Base Lewis-McChord in Washington state reported losing contact with the drone during a training flight conducted at Fort Huachuca in Arizona.

Watch the Shadow Drone!

Despite considerable efforts to locate the missing Shadow, it has not been found and is thought to have disintegrated upon impact somewhere in the local area,” the Army said in a statement.