Here are a number of events from this date in history, April 23.
1791: President James Buchanan is born in Cove Gap, Pennsylvania.
1921: Baseball Hall of Famer Warren Spahn is born in Buffalo, New York.
1936: Singer-songwriter Roy Orbison is born in Vernon, Texas.
1968: Students at Columbia University take over administration building during anti-war protest.
1985: Coca-Cola changes 100 year old formula, and is swamped with requests to bring back original, which it does three months later.
1995: Sportscaster Howard Cosell dies in New York City at age 77.
2005: First YouTube video is uploaded by a friend of co-founder Jawed Karim. It's titled, "Me At The Zoo."
2007: Former Russian president Boris Yeltsin, 76, dies in Moscow.