randy shandobil looked at how things had changed for labor in the 12 years since the patco strike. >> reporter: near the foot of san francisco's market street there is a monument to workers. the mechanics monument. on this labor day people all but ignored it. to most people this day symbolizing the last day of summer. the day triggers memories of the battle the parents and grandparents of shoppers and picnickers had to fight. >> men and woman long before they came on the scene got their skulls busted, went to jail. >> no contract, no welfare, no benefit, no job protection against injury. >> reporter: labor historian archie green talks about what it was like for workers when the first labor day was celebrated. he says labor didn't celebrate any particular union. >> and you raced down the waterfront and you stood in line like a dog, formed a circle outside of the pier. you stand in the circle and a hiring boss comes down and says, charlie, i'll take you. jim, come on in. okay i got enough men, the rest of you guys get the hell out of here. >> reporter: if you were picked you would work