So I recently graduated from the Naval Special Warfare Orientation Course and one of my Land Warfare instructors was a retired GySgt. As far as we could tell from the couple time he let slip, he had been in Recon and been to many places including South America. But we noticed he had the tattoo of the skull in the diamond surrounded by the stars and when we asked him about it all we got was "I've been nowhere and I've done nothing" or "I inspected mattresses". Is that tattoo the MARSOC badge and if so is it common for Marines to have it? I understand that if this question violates OPSEC then there is no need to answer it.