US Air Force (USAF) AIRMAN First Class (A1C) Robert Villarreal (left) and USAF Technical Sergeant (TSGT) John Hagood, both assigned to the 379th Expeditionary Security Forces Squadron (ESFS), check the tires on their M1026, High-Mobility Multipurpose Wheeled Vehicle (HMMWV) for foreign objects, before entering the flight line at Udeid Air Base (AB), Qatar