On this day, July 29 ...

1981: Britain's Prince Charles marries Lady Diana Spencer in a ceremony at St. Paul's Cathedral in London. (The couple would divorce in 1996.)

Also on this day:

1914: Transcontinental telephone service in the U.S. becomes operational with the first test conversation between New York and San Francisco.

Transcontinental telephone service in the U.S. becomes operational with the first test conversation between New York and San Francisco. 1921: Adolf Hitler becomes the leader of the National Socialist German Workers Party.

1958: President Dwight D. Eisenhower signs the National Aeronautics and Space Act, creating NASA.

1965: The Beatles' second feature film, "Help!," has its world premiere in London.

1967: An accidental rocket launch on the deck of the supercarrier USS Forrestal in the Gulf of Tonkin results in a fire and explosions that kill 134 servicemen. (Among the survivors is future Arizona Sen. John McCain, a U.S. Navy lieutenant commander.)

An accidental rocket launch on the deck of the supercarrier USS Forrestal in the Gulf of Tonkin results in a fire and explosions that kill 134 servicemen. (Among the survivors is future Arizona Sen. John McCain, a U.S. Navy lieutenant commander.) 1975: Gerald R. Ford becomes the first U.S. president to visit the site of the Nazi concentration camp Auschwitz.

Gerald R. Ford becomes the first U.S. president to visit the site of the Nazi concentration camp Auschwitz. 1997: Members of Congress from both parties embrace compromise legislation designed to balance the budget while cutting taxes.

Members of Congress from both parties embrace compromise legislation designed to balance the budget while cutting taxes. 2004: Sen. John Kerry accepts the Democrats' presidential nomination at the party's convention in Boston with a military salute and the declaration: "I'm John Kerry and I'm reporting for duty."

Sen. John Kerry accepts the Democrats' presidential nomination at the party's convention in Boston with a military salute and the declaration: "I'm John Kerry and I'm reporting for duty." 2009: Microsoft and Yahoo! announce a 10-year Internet search partnership under which Bing would replace Yahoo! Search, as the companies agree to take on the overwhelming dominance of Google in the online advertising market.

Microsoft and Yahoo! announce a 10-year Internet search partnership under which Bing would replace Yahoo! Search, as the companies agree to take on the overwhelming dominance of Google in the online advertising market. 2009: Federal authorities arrest more than 30 suspects, including doctors, in a major Medicare fraud bust in New York.