Col. William H. Vivian, commanding officer, and Col. Jay M. Bargeron, former commanding officer, 7th Marine Regiment, conduct a pass in review during the regiment’s change of command ceremony at Torrey L. Gray Field, Dec. 18, 2015. (Official Marine Corps photo by Lance Cpl. Thomas Mudd/Released) - Col. William H. Vivian, commanding officer, and Col. Jay M. Bargeron, former commanding officer, 7th Marine Regiment, conduct a pass in review during the regiment’s change of command ceremony at Torrey L. Gray Field, Dec. 18, 2015. (Official Marine Corps photo by Lance Cpl. Thomas Mudd/Released)