U.S. Sailors conduct a personnel decontamination wash down and gear exchange during their final field training exercise at Fort Hunter Liggett, Calif., Sept. 30, 2011. The Seabees are assigned to the chemical, biological and radiological team, Naval Mobile Construction Battalion (NMCB) 40. NMCB-40 will be decommissioned at the conclusion of their next deployment in September 2012.