Lt. Cmdr. Donald A. Baker, chaplain, Headquarters Battalion, began his military career as a Marine officer. Over the years, he developed a love for music as well as a desire to help the Marines with whom he served and made the decision to become a chaplain. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released) - Lt. Cmdr. Donald A. Baker, chaplain, Headquarters Battalion, began his military career as a Marine officer. Over the years, he developed a love for music as well as a desire to help the Marines with whom he served and made the decision to become a chaplain. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released)