General Motors bought the Chevrolet Motor Company of Delaware.
Source
The FBI's most wanted man, Osama bin Laden, was killed by the US Navy Seals and CIA operatives in Abbottabad, Pakistan.
The territory of Oklahoma was incorporated.
The Stanley Cup Finals took place with the Toronto Maple Leafs beating the Montreal Canadiens.
The Writers Guild of America went on strike after a labor dispute.
Take Me Out to the Ball Game was copyrighted.
