Army Sgt. Robert Terrell, a combat engineer from the 22nd Engineer Clearance Company, 864th Engineer Battalion, 555th Engineer Brigade, and Air Force Staff Sgt. Rafael Delvalle, a M153 CROWS instructor from the 627th Security Forces Squadron mount an M2 Browning .50-caliber machine gun to a M153 Common Remotely Operated Weapon Station during a trainer course for Army combat engineers Jan. 27 on Joint Base Lewis-McChord. (Photo Credit: Nathan Wilkes, Joint Base Lewis-McChord Public Affairs)