Skylab 4 returned to earth after 84 days in orbit.Stephen King published his first novel.The Universal Product Code was scanned for the first time to sell a pack of Wrigley's gum at a Marsh Supermarket store in Troy, Ohio.President Richard Nixon announced his resignation amidst the Watergate scandal.Muhammad Ali knocked out George Foreman in Zaire to regain the heavyweight title.A Hungarian architecture professor invented Rubik's Cube.Derek Jeter and Leonardo DiCaprio were born.And Joe Piane, now the veteran in the University of Notre Dame head coaching ranks, joined the Irish athletic staff as an assistant track coach.