June 21, 1877 - Ten miners, allegedly members of the Molly Maguires and convicted as murderers, were hanged in Pennsylvania. Historians question whether the Molly Maguires, allegedly a secret miners’ organization, actually existed. Decades after the hangings, the Molly Maguires became familiar to millions of moviegoers through a film by the same name starring Richard Harris and Sean Connery.
June 21, 1964 - Civil rights workers Andrew Goodman, James Chaney and Michael Schwerner disappeared near Philadelphia, Mississippi. Federal agents eventually found their mangled bodies; Klansmen and Mississippi police had kidnapped the activists and beaten them to death with clubs and chains.