Sgt. Heather Keasler, platoon sergeant, Installation Personnel Administration Center, enjoys studying language and culture to broaden her understanding about the world. She hopes to become a drill instructor and help make Marines who will excel above the highest military standard. (Official Marine Corps photo by Lance Cpl. Connor Hancock/Released) - Sgt. Heather Keasler, platoon sergeant, Installation Personnel Administration Center, enjoys studying language and culture to broaden her understanding about the world. She hopes to become a drill instructor and help make Marines who will excel above the highest military standard. (Official Marine Corps photo by Lance Cpl. Connor Hancock/Released)