Gunnery Sergeant Dustin Hamilton, a safety specialist on Marine Corps Logistics Base Barstow, rolls his sleeve up June 21, to show a motivational tattoo on his arm. Marines often get tattoos as a sign of pride for their service. (Photo by Carlos Guerra) - Gunnery Sergeant Dustin Hamilton, a safety specialist on Marine Corps Logistics Base Barstow, rolls his sleeve up June 21, to show a motivational tattoo on his arm. Marines often get tattoos as a sign of pride for their service. (Photo by Carlos Guerra)