Right after photographing this, a middle-aged man asked me, "Are you a vet?" He was very obviously drunk.
"No," I simply said, though I should have said, "No, but I was in 'Nam!"
If I remember correctly, he was no more than 55, but I couldn't gauge, right then and there, if he could have been a Vietnam vet. In which case, it may not be wise to shout "'Nam" at him.