Kent State, Ohio. May 4, 1970. National Guard troops fire on an unarmed crowd of students protesting the escalation of the Viet Nam war into Cambodia, killing four and wounding nine. Incidentally, the young woman is Mary Ann Vecchio, a 14 year old runaway, who was identified by her father from this photo.

This event was key in turning public sentiment against the war which was brought to an end just a few years later. I remember it well.