I've known Vietnam vets who are complete BS artists (not to say the guy you know is), for instance, one guy I know was a Marine sniper and every story he told about his service was lifted straight from the biography "Marine Sniper: 93 Confirmed Kills" about Carlos Hatchcock. I can't image how he figured none of us would realize this.
The expression "Don't shoot until you see the whites of their eyes" doesn't apply anymore, I guess, when your popping guys a 600 yards with iron sights.
