Today is Saturday, April 30, the 121st day of 2016. There are 245 days left in the year.

On this date:

In 1939, the New York World’s Fair officially opened with a ceremony that included an address by President Franklin D. Roosevelt.

In 1945, as Soviet troops approached his Berlin bunker, Adolf Hitler committed suicide along with his wife of one day, Eva Braun.

In 1956, former Vice President Alben W. Barkley, 78, collapsed and died while delivering a speech at Washington and Lee University in Lexington, Virginia.

In 1958, the American Association of Retired Persons (later simply AARP) was founded in Washington, D.C., by Dr. Ethel Percy Andrus.

In 1968, New York City police forcibly removed student demonstrators occupying five buildings at Columbia University.

In 1973, President Richard Nixon announced the resignations of top aides H.R. Haldeman and John Ehrlichman, Attorney General Richard G. Kleindienst and White House counsel John Dean, who was actually fired.

In 1975, the Vietnam War ended as the South Vietnamese capital of Saigon fell to Communist forces.

In 1988, Gen. Manuel Noriega, waving a machete, vowed at a rally to keep fighting U.S. efforts to oust him as Panama’s military ruler.