May 4, 1886  — The Haymarket Square Riot occurred in Chicago after 180 police officers advanced on 1,300 persons gathered in the square listening to speeches of labor activists and anarchists. A bomb was thrown. Seven policemen were killed and over 50 wounded. Four anarchists were then charged with conspiracy to kill, convicted and hanged while another committed suicide in jail. Three others were given lengthy jail terms.

May 4, 1970  — At Kent State University, four students — Allison Krause, 19; Sandra Lee Scheuer, 20; Jeffrey Glenn Miller, 20; and William K. Schroeder, 19 — were killed by National Guardsmen who opened fire on a crowd of 1,000 students protesting President Richard Nixon's decision to invade Cambodia. Eleven others were wounded. The shootings set off tumultuous campus demonstrations across America resulting in the temporary closing of over 450 colleges and universities.

IM-25 home video materials