Sgt. John T. Skipper was convicted of destruction of government property for his role in a botched Humvee air drop that destroyed three of the vehicles during an April 2016 training exercise. Sgt. Justin Geiger/Army hide caption toggle caption Sgt. Justin Geiger/Army The Two-Way VIDEO: Soldier Who Deliberately Destroyed Airdropped Humvees Found Guilty, Discharged May 10, 2018 It was supposed to be a straightforward training exercise. Instead, Sgt. John Skipper cut the parachute strings to three Humvees and they were demolished as they hit the ground.