This Day In History for May 25

1787, the Constitutional Convention was convened in Philadelphia after enough delegates had shown up for a quorum.

In 1810, Argentina began its revolt against Spain.

In 1895, playwright Oscar Wilde was convicted of a morals charge in London; he was sentenced to prison.

In 1935, Babe Ruth hit the 714th and final home run of his career, for the Boston Braves, in a game against the Pittsburgh Pirates.

In 1946, Transjordan (now Jordan) became a kingdom as it proclaimed its new monarch, King Abdullah Ibn Ul-Hussein.

In 1961, President Kennedy asked the nation to work toward putting a man on the moon by the end of the decade.

In 1963, the Organization of African Unity was founded, in Addis Ababa, Ethiopia.

In 1968, the Gateway Arch, part of the Jefferson National Expansion Memorial in St. Louis, was dedicated.

In 1976, US Representative Wayne L. Hays (Democrat, Ohio) admitted to a "personal relationship" with Elizabeth Ray, a committee staff member who claimed she'd received her job in order to be Hays' mistress.

In 1979, 275 people died when an American Airlines DC-10 crashed on takeoff from Chicago's O'Hare airport.

In 1992, Jay Leno made his debut as full-time host of NBC's "Tonight Show," succeeding Johnny Carson.