Sgt. D.B. Castillo instructs his Marines to continue fire suppression fire.
U.S. Marine Corps Sgt. D.B. Castillo, with India Company, 3rd Battalion, 5th Marine Regiment, instructs his Marines to continue fire suppression fire at Range 410 at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., during training exercise Enhanced Mojave Viper on July 14, 2010. Enhanced Mojave Viper is a combined arms exercise that prepares Marines for deployment to Afghanistan.