Lance Cpl. Kyle J. Palmer (right) and Lance Cpl. Samuel E. Robertson (left), mortarmen with the 81mm Mortars Platoon, Weapons Company, Battalion Landing Team 2nd Battalion, 7th Marines, 31st Marine Expeditionary Unit, prepare to fire a mortar during a joint live fire exercise on July 14, 2011. Marines and sailors of the 31st Marine Expeditionary Unit are in Australia participating in exercise Talisman Sabre 2011. Talisman Sabre is the largest joint military exercise undertaken by the Australian Defense Force.