MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight check for threats during a tactical reload drill Jan. 8 at Ski Hill. The drill was part of a bi-monthly, four-mile ruck march. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Staff Sgt. Michael Overton, 35th Civil Engineer Squadron Explosive Ordnance Disposal craftsman, leads a tactical formation during a ruck march Jan. 8 at Ski Hill. Spacing is key during tactical formations; if someone faces danger, the rest of the formation can assess the situation and respond accordingly at a reasonable distance. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Tech. Sgt. Jeffery Hansen, 35th Civil Engineer Squadron Explosive Ordnance Disposal technician, marches along Concrete Canyon Jan. 8. Ruck marches are one way Air Force EOD units train physically for the demands of the job. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight march along Concrete Canyon Jan. 8 during a ruck march. Ruck marches are part of the flight's pre-deployment training, preparing members for dismounted-patrol support while in various austere landscapes. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight conduct a bounding drill during a ruck march Jan. 8 while ascending Suicide Hill. The drill demonstrated a firing tactic where one group makes their way uphill, while another group engages enemy positions. The responsibilities of the groups alternated until both reached their final position. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight conduct a bounding drill during a ruck march Jan. 8 while ascending Suicide Hill. Members of the flight said Suicide Hill was among the toughest parts of the march due to its abrupt angle. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight discuss transition drill tactics during a ruck march Jan. 8. The flight performed numerous drills during the march, which demanded cooperation from team members. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Members of the 35th Civil Engineer Squadron Explosive Ordnance Disposal flight perform a transition drill Jan. 8 during a ruck march. The drill trained members on the proper way to transition from a primary weapon to a secondary weapon. (U.S. Air Force photo/Senior Airman Jamal D. Sutter)

MISAWA AIR BASE, Japan -- Staff Sgt. Paul Willson, 35th Civil Engineer Squadron Explosive Ordnance Disposal technician, completes a four-mile ruck march Jan. 8. 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)