1979

The Iran hostage crisis began as militants stormed the United States Embassy in Tehran, seizing its occupants; for some of the hostages, it was the start of 444 days of captivity.

1991

Ronald Reagan opened his presidential library in Simi Valley. Attending were President George H.W. Bush and former Presidents Jimmy Carter, Gerald R. Ford and Richard Nixon.

2008

Democratic Sen. Barack Obama of Illinois was elected the first Black president of the United States.