Master Gunnery Sgt. Mark Gleason, bandmaster and acting drum major, marches his Marines in a celebration parade in Nuku'alofa, Tonga July 8, 2015. The mission of the U.S. Marine Corps Forces, Pacific Band is to enhance the lives of military and civilian communities through quality musical performance. (U.S. Marine Corps photo by Cpl. Brittney Vito/Released) - Master Gunnery Sgt. Mark Gleason, bandmaster and acting drum major, marches his Marines in a celebration parade in Nuku'alofa, Tonga July 8, 2015. The mission of the U.S. Marine Corps Forces, Pacific Band is to enhance the lives of military and civilian communities through quality musical performance. (U.S. Marine Corps photo by Cpl. Brittney Vito/Released)