Staff Sgt. Paul Willson, 35th Civil Engineer Squadron Explosive Ordnance Disposal technician, completes a four-mile ruck march Jan. 8 at Misawa Air Base, Japan. Including a rucksack, body armor, helmet and weapon, members of the EOD flight carried more than 100 pounds of gear during the march. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)