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Eight anarchists were tried for conspiracy to commit murder; seven were convicted, and four were hanged in November 1887.  This was a huge embarrassment for the union movement, which did include many socialists and anarchists.  It caused a delay in acceptance of the eight-hour workday, and many workers left the Knights of Labor to join the more moderate American Federation of Labor.<ref>http://www.u-s-history.com/pages/h750.html</ref>

Eight anarchists were tried for conspiracy to commit murder; seven were convicted, and four were hanged in November 1887.  This was a huge embarrassment for the union movement, which did include many socialists and anarchists.  It caused a delay in acceptance of the eight-hour workday, and many workers left the Knights of Labor to join the more moderate American Federation of Labor.<ref>http://www.u-s-history.com/pages/h750.html</ref>

Despite the fact that radicals killed policemen in the Haymarket Square riots, in 1969 radicals (including Barack Obama's friend Bill Ayers) detonated a bomb to destroy a statute honoring the fallen policemen.  The mayor of Chicago correctly criticized it as an attack on law and order.<ref>Bill Ayers, "Fugitive Days" at p. 176 (Beacon Press: Boston, Massachusetts 2001)</ref>

Despite the fact that radicals killed policemen in the Haymarket Square riots, in 1969 radicals (including future President Barack Obama's friend Bill Ayers) detonated a bomb to destroy a statute honoring the fallen policemen.  The mayor of Chicago correctly criticized it as an attack on law and order.<ref>Bill Ayers, "Fugitive Days" at p. 176 (Beacon Press: Boston, Massachusetts 2001)</ref>

Another violent conflict involving striking workers occurred near Pittsburgh in 1892, called the Homestead Strike.  Guards hired by wealthy businessman Andrew Carnegie suppressed a strike by workers, and ten were killed in the conflict.

Another violent conflict involving striking workers occurred near Pittsburgh in 1892, called the Homestead Strike.  Guards hired by wealthy businessman Andrew Carnegie suppressed a strike by workers, and ten were killed in the conflict.