A Marine from 2nd Marine Division explains to Miranda E. Moran and Kurt A. Schafer, two JROTC students from Naples High school, the capabilities of the Mark 19 automatic grenade launcher and other weapons. The Marines here are in support of Fleet Week Port Everglades 2010 to enhance the image of the military among the residents of southern Florida. - A Marine from 2nd Marine Division explains to Miranda E. Moran and Kurt A. Schafer, two JROTC students from Naples High school, the capabilities of the Mark 19 automatic grenade launcher and other weapons. The Marines here are in support of Fleet Week Port Everglades 2010 to enhance the image of the military among the residents of southern Florida.