Shortly before the Days of Rage demonstrations on October 6 , 1969 , the Weatherman planted a bomb that blew up a statue in Chicago built to commemorate police casualties incurred in the 1886 Haymarket Riot . The blast broke nearly 100 windows and scattered pieces of the statue onto the Kennedy Expressway below . The statue was rebuilt and unveiled on May 4 , 1970 ( coincidentally , the same day as the Kent State massacre ) , only to be blown up by the Weathermen a second time on October 6 , 1970 . The statue was rebuilt once again and Mayor Richard J. Daley posted a 24-hour police guard to protect it , but the statue was later destroyed again a third time . The monument was rebuilt and is located at Chicago Police Headquarters
Kent State massacre
Kent State shootings
Weather Underground