I don't know, I knew a guy (let's call him George) in the early 90's, worked as a consultant for an Environmental consulting firm I was at for about a year. He was hard to reach, cell phones weren't really out and no home phone at his apartment, he said he was Army Ranger who had served in Nam (red flag....just wait), son was a Navy Seal, George would stop in the office a couple of times a week to see if we needed him for any work, sometimes we did, sometimes not. But he did have a pager, so we asked him if we could page him when we had work for him. His answer was that it really wasn't his pager, after some badgering he said it was a DoD pager. A few months later George told us he wasn't available to work for a few months, that he had been called up to go back into the military.
I saw him for the last time about mid-1991, he was just back from Desert Storm and his story was that he was part of an insertion team that went into Iraq (he wouldn't say where) and that their job was to laser paint targets for the bombs/missile that were coming in. I have not idea what ever became of George, but he'd have to be about 80+ by now, it could all been a hoax, but I believed him. Very interesting guy, very rough around the edges, but seemed like straight shooter if you were straight with him.