Anti-Vietnam war tensions had reached their height in the first year of the decade. Four days earlier President Richard Nixon had announced a future opperation in Cambodia, escellating the Vietnam War.
At Kent State a peaceful protest turned violent when members of the Ohio National Guard opened fire on a goup of students, killing four and wounding 9 others.
Over a period of 13 seconds the guardsmen fired 67 shots into the crowd.
This is one of the prime examples of abuse of power by law enforcement and the extremes to which the Vietnam War drove the American Public.