Air traffic controller's strike of 1981; Anti-Chinese riots of 1885 and 1886; Baseball players revolt of 1889-1890; Boston massacre of 1770; Chicago race riot of 1919; Detroit race riot of 1946; East St. Louis race riot of 1917; Everett Washington massacre of 1916; Imperial Valley, California, farmworkers strike of 1930; Imperial Valley, California, farmworkers strike of 1934; Molly Maguires; Pullman strike and boycott of 1894; San Francisco anti-Chinese riots of 1877; Slave rebellions; Ten-hour movement of 1835; Tompkins Square riot of1874; Triangle fire of 1911; Uprising of 20,000 of 1909.