139,000 people lost their lives when Cyclone Nargis made landfall in Myanmar.
Source
The territory of Oklahoma was incorporated.
The first game of the Negro National League was played at Washington Park in Indianapolis.
An assassination attempt was made on Gangster Frank Costello.
General Motors bought the Chevrolet Motor Company of Delaware.
The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.