On April 23, 1954, Hank Aaron hit the first home run of his Major League Baseball career. Twenty years later, he would break Babe Ruth’s career home run mark of 714.
On April 23, 1968, students at New York City’s Columbia University held a demonstration to protest military research and the condemnation of part of the neighboring Morningside Heights section of Harlem to make way for a new student gymnasium. The protest escalated into a week-long occupation of five campus buildings before police moved in. Some 712 students were arrested, and over 100 injured during the forcible eviction. After the university-ordered police response, a student strike shut down the campus for the rest of the semester.