Final answer:
In 1968, two important political and social leaders were assassinated: Martin Luther King Jr. and Robert F. Kennedy. These assassinations had a significant impact on the civil rights movement and the political landscape of the United States.
Step-by-step explanation:
In 1968, two important political and social leaders were assassinated. The first assassination was that of Martin Luther King Jr., who was a prominent civil rights activist. He was assassinated on April 4, 1968, in Memphis, Tennessee. The second assassination was that of Robert F. Kennedy, who was a prominent political figure and brother of President John F. Kennedy. He was assassinated on June 5, 1968, in Los Angeles, California. These assassinations had a significant impact on the civil rights movement and the political landscape of the United States.