Petty Officer 1st Class David A. Whittington, corpsman, Public Health, Robert E. Bush Naval Hospital, has served in the Navy for 15 years. Throughout his career, he has enjoyed being able to serve alongside Marines. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released) - Petty Officer 1st Class David A. Whittington, corpsman, Public Health, Robert E. Bush Naval Hospital, has served in the Navy for 15 years. Throughout his career, he has enjoyed being able to serve alongside Marines. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released)