2nd Fleet Anti-Terrorism Security Team & 5th Battalion, Royal Australian Regiment get in a training evolution...

U.S. Marine Lance Cpl. Kyle Nielson, with 2nd Fleet Anti-Terrorism Security Team out of Norfolk, Va., demonstrates how FAST Marines transition from primary to secondary weapons for Australian Army Soldiers with 5th Battalion, Royal Australian Regiment at Robertson Barracks, Darwin, Australia, Nov. 23, 2011. FAST Marines are attending Exercise Semper Fast 2011, a combined training event hosted by 5th Battalion, Royal Australian Regiment focusing on small arms ranges, direct fire ranges, military operations on urban terrain, and light infantry operations. (U.S. Marine Corps photo by Sgt. Pete Thibodeau)

Australian Army Sgt. Bruce Morris, with 5th Battalion, Royal Australian Regiment (5 RAR), gives a class on Australian military weapons systems to U.S. Marines with 2nd Fleet Anti-Terrorism Security Team out of Norfolk, Va., on Robertson Barracks, Darwin, Australia, Nov. 21, 2011. FAST Marines are attending Exercise Semper Fast 2011, a combined training event hosted by 5th Battalion, Royal Australian Regiment focusing on small arms ranges, direct fire ranges, military operations on urban terrain, and light infantry operations. (U.S. Marine Corps photo by Sgt. Pete Thibodeau)

Australian Army Cpl. Phillip Trease, with 5th Battalion, Royal Australian Regiment (5 RAR), gives a class on Australian military weapons systems to U.S. Marines with 2nd Fleet Anti-Terrorism Security Team out of Norfolk, Va., on Robertson Barracks, Darwin, Australia, Nov. 21, 2011. FAST Marines are attending Exercise Semper Fast 2011, a combined training event hosted by 5th Battalion, Royal Australian Regiment focusing on small arms ranges, direct fire ranges, military operations on urban terrain, and light infantry operations. (U.S. Marine Corps photo by Sgt. Pete Thibodeau)

An Australian Army Soldier with 5th Battalion, Royal Australian Regiment tries on Marine Corps protective gear from U.S. Marines with 2nd Fleet Anti-Terrorism Security Team out of Norfolk, Va., at Robertson Barracks, Darwin, Australia, Nov. 23, 2011. FAST Marines are attending Exercise Semper Fast 2011, a combined training event hosted by 5th Battalion, Royal Australian Regiment focusing on small arms ranges, direct fire ranges, military operations on urban terrain, and light infantry operations. (U.S. Marine Corps photo by Sgt. Pete Thibodeau)