Sailors with the Preventive Medicine Unit, 2nd Marine Logistics Group, place traps along a tree line aboard Camp Lejeune, N.C., May 8, 2012. Throughout the year, PMU performs many tasks to keep the living conditions on base at a high standard. The unit is now working hard as the summer months approach to catch and test mosquitoes from across the base for malaria. (U.S. Marine Corps photo by Pfc. Franklin E. Mercado) - Sailors with the Preventive Medicine Unit, 2nd Marine Logistics Group, place traps along a tree line aboard Camp Lejeune, N.C., May 8, 2012. Throughout the year, PMU performs many tasks to keep the living conditions on base at a high standard. The unit is now working hard as the summer months approach to catch and test mosquitoes from across the base for malaria. (U.S. Marine Corps photo by Pfc. Franklin E. Mercado)