Vehicle crews, from 1st Battalion, 18th Infantry Regiment, 2nd Armored Brigade Combat Team, 1st Infantry Division, practiced firing machine guns from moving Humvees during a vehicle gunnery exercise here, Nov. 14-22. The Soldiers mounted M240 Squad Automatic Weapons and M2 50-caliber machine guns to their Humvees and worked on marksmanship and maneuver during a series…