Cpl. Anthony Pen, training cadre, 7th Marine Regiment, native of Springfield, Mass., talks to a member of the 1st Marine Division Association, Desert Cities Mitchell Paige Medal of Honor Chapter, about the functionalities of different types of weapons Marines currently use during a tour aboard the Combat Center, April 8, 2015. (Official Marine Corps Photo by Lance Cpl. Medina Ayala-Lo/Released) - Cpl. Anthony Pen, training cadre, 7th Marine Regiment, native of Springfield, Mass., talks to a member of the 1st Marine Division Association, Desert Cities Mitchell Paige Medal of Honor Chapter, about the functionalities of different types of weapons Marines currently use during a tour aboard the Combat Center, April 8, 2015. (Official Marine Corps Photo by Lance Cpl. Medina Ayala-Lo/Released)