On this day, March 29, in 1973, eight Ohio National Guardsmen were indicted on civil rights charges for shooting at war protesters at Kent State University, killing four students and wounding nine others.
On May 4, 1970, students at campuses across the country were angered after President Nixon, who had campaigned to end the war, widened it by invading Cambodia.
The ROTC building at Kent State had been burned down two days earlier.
During a standoff between the guardsmen and 1,000 or more students, some of the guardsmen suddenly raised their rifles and fired.
Killed were Jeffrey Miller, 20, Allison Krause, 19, Sandra Scheuer, 20, and Bill Schroeder, 19, an ROTC student who had been watching the protest.
A federal judge dismissed the criminal case against the guardsmen in 1974, and five years later a settlement was reached in a civil suit.