once he walked past the police perimeter at the atlanta marriott marquis , jack braun saw hundreds of convention delegates , dressed mostly in casual clothes , silly hats , and vests covered with campaign buttons ; several stretch limos carrying party elders ; a 1971 primer-gray chevrolet impala with a swastika flag fluttering from the aerial and three uniformed nazi storm troopers sitting stonefaced in the front seat-for some reason no one was in back-and two gangs of jokers hanging their disfigured heads out of battered vw microbuses , waving at the crowd , and laughing at the reactions of the pedestrians .