1. January 13: Johnny Cash plays Folsom Prison.
2. January 31: Tet Offensive in Vietnam.
3. April 3: Planet of the Apes premieres.
4. April 4: Martin Luther King, Jr. is assassinated.
5. April 6: Kubrick's 2001: A Space Odyssey debuts.
6. June 3: Andy Warhol survives attempted assassination.
7. June 6: Robert F. Kennedy dies.
8. July 30: The Beatles' boutique in London totally fails.
9. August 19: Tom Wolfe publishes The Electric Kool-Aid Acid Test.
10. November 5: Nixon is elected president.
11. November 13: The Beatles release their movie, Yellow Submarine.
12. December 24: Apollo 8 goes to the moon.
Facts via the Minnesota Historical Society's 1968 Exhibit Timeline. Check it out for tons more on this crucial year in American history.