SEP 4 1969, SEP 5 1969; UNIDENTIFIED GROUP FIGHTS DURING STUDENT DISTURBANCE ON BOULDER STREET; Crow [Getty Images]

SEP 4 1969, SEP 5 1969; UNIDENTIFIED GROUP FIGHTS DURING STUDENT DISTURBANCE ON BOULDER STREET; Crowd was on 13th St., between Pennsylvania St. and College Ave. during a march.; Boulder Radicals Fail To Get Rally Support; (Photo By Steve Larson/The Denver Post via Getty Images)

Denver Post Steve Larson