fighters coming home from fighting with pancho villa. many of the early anti- marijuana laws seemed tied to the fear of foreigners. for example, san francisco enacted the first anti- narcotics law in the united states in 1875, outlaw opium dens. >> it was directed at the chinese and in 1914 they made a display of destroying opium pipes in front of city hall. many of the america's first anti-marijuana laws came in state where's mexican citizens migrated in search of work just california, texas, new mexico, colorado and montana. others came in northeastern states, such as network. states with few mexican immigrants, but instead as a fear that they outlawed cocaine, heroin, morphine, people would turn to marijuana as an alternative. still there was no national law against marijuana, that is until 1937. the 13--year national prohibition against alcohol had ended four years earlier. and led by the head of the federal bureau of narcotics, the country turned its attention to other drugs. in 1936 a film called "reefer madness" dramatized a popul