A tire pressure valve box sits on the ground while Senior Airman Bradley Poirier, a crew chief with the 35th Aircraft Maintenance Squadron, fills an F-16 Fighting Falcon tire with air at Misawa Air Base, Japan, March 15, 2016. Making sure the tires are filled to the correct pressure is crucial, as over or under filling the tires can cause serious injury to personnel and assests. (U.S. Air Force photo by Senior Airman Brittany A. Chase)