Cpl. Richard Campbell Jr. (right) and Lance Cpl. James Chappell, with the Low Altitude Air Defense Detachment for the 24th Marine Expeditionary Unit, practice firing a simulated FIM-92C Stinger Missile off the port side of the USS Iwo Jima (LHD 7) during the Defense of the Amphibious Task Force Naval qualification exercise on Dec. 3, 2011. Defense of the Amphibious Task Force is one of many qualifications that make up the Composite Training Unit Exercise scheduled to take place Nov. 28 to Dec. 21. The Defense of the Amphibious Task Force drill allowed the Marines to integrate with their Navy counterparts to rehearse how they would protect the ships of the amphibious ready group while traveling through high threat areas at sea.