Shortly before the Days of Rage demonstrations on October 6, 1969,[64] the Weatherman planted a bomb that blew up a statue in Chicago built to commemorate police casualties incurred in the 1886 Haymarket Riot.[2] The blast broke nearly 100 windows and scattered pieces of the statue onto the Kennedy Expressway below.[65] 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.[65][66] The statue was rebuilt once again and Mayor Richard J. Daley posted a 24-hour police guard to protect it,[65] but the statue was later destroyed again a third time.