MARINE CORPS BASE CAMP LEJEUNE, N.C.- Sgts. Juan A. Gavilanes and William C. Dove and Pfcs. Jermaine L. Francis and Maurice J. Oden, all artillerymen from Battery K, 3rd Battalion, 10th Marine Regiment side-straddle hop as part of their gas mask re-certification here, June 20. ?These exercises give Marines the confidence to know that they can work with the mask on,? said Cpl. Michael Cronkhite, the nuclear, biological and chemical chief for the battalion. - MARINE CORPS BASE CAMP LEJEUNE, N.C.- Sgts. Juan A. Gavilanes and William C. Dove and Pfcs. Jermaine L. Francis and Maurice J. Oden, all artillerymen from Battery K, 3rd Battalion, 10th Marine Regiment side-straddle hop as part of their gas mask re-certification here, June 20. ?These exercises give Marines the confidence to know that they can work with the mask on,? said Cpl. Michael Cronkhite, the nuclear, biological and chemical chief for the battalion.