Tech. Sgt. T.J. Lombardi, 173rd Security Forces Squadron, uses a large tractor tire donated by the local Les Schwab Tire Center in Klamath Falls, Ore., to perform a morning physical training session, Aug. 10, 2018. The tires weigh anywhere from 75-500 pounds and can require a team of people to flip them, which security forces uses as tool for fitness, teamwork and thinking while under physical duress. (U.S. Air National Guard photo by Tech. Sgt. Jefferson Thompson)