Staff Sgt. Thomas Walsh, training chief, Scout Sniper Platoon, takes aim and gets ready to fire his rifle during a training event at Weapons Training Battalion aboard Marine Corps Base Quantico on April 6, 2013. The unit was cleared to shoot all the way up to 1,000 yards on Range 4. - Staff Sgt. Thomas Walsh, training chief, Scout Sniper Platoon, takes aim and gets ready to fire his rifle during a training event at Weapons Training Battalion aboard Marine Corps Base Quantico on April 6, 2013. The unit was cleared to shoot all the way up to 1,000 yards on Range 4.