1 of 6 | On May 31, 2005, Mark Felt (pictured) admitted that, while No. 2 man in the FBI, he was "Deep Throat," the shadowy contact whose help to Washington Post reporters Bob Woodward and Carl Bernstein on the 1972 Watergate break-in led to U.S. President Richard Nixon's resignation. File Photo courtesy of the FBI

On this date in history:

In 1790, President George Washington signed a bill creating the first U.S. copyright law.

In 1859, construction concluded and bells rang out for the first time from London's Big Ben clock tower.

In 1889, a flood in Johnstown, Pa., left more than 2,200 people dead.