Utilitiesman 1st Class Brad Sweeting, assigned to Naval Mobile Construction Battalion 133 Detachment Guam balances chemicals in the in a Reverse Osmosis Water Purification Unit. Petty Officer Sweeting was one of eight Seabees from NMCB 133 Detachment Guam who participated in the Air Force’s Silver Flag training exercise at Anderson AFB. Seabees combined with other Air Force civil engineering units to support the exercise.