US Air Force (USAF) SENIOR AIRMAN (SRA) David Dottavio (left), Structural Journeyman, USAF Technical Sergeant (TSGT) Reagan Musser, Heavy Equipment Operator, and USAF TSGT Mike Markley (right), Structural Craftsman, 320th Expeditionary Civil Engineering Squadron (ECES), strap down support braces to a wall frame. The wall will go along the side of a protective bunker at a forward-deployed location. The bunkers are part of the continuous build up at forward-deployed locations supporting Operation ENDURING FREEDOM