On June 15, 2012, 33-year-old aerialist Nik Wallenda becomes the first person to walk across high wire stretched over Niagara Falls, which lie on the border between New York state and Ontario, Canada.

On June 15, 2005, more than two weeks after American teen Natalee Holloway vanished while on a high school graduation trip to the Caribbean island of Aruba, police there search the home of 17-year-old Joran Van der Sloot, one of the last known people to see the young woman alive.

On June 15, 1974, Simon & Schuster releases All the President’s Men, the first definitive book about the Watergate scandal, authored by Bob Woodward and Carl Bernstein, the two Pulitzer Prize-winning investigative reporters from The Washington Post who broke the explosive story.

On June 15, 1917, some two months after America’s formal entrance into World War I against Germany, the United States Congress passes the Espionage Act.

Robert Falcon Scott’s ship, the Terra Nova, sets sail from Cardiff, Wales on June 15, 1910, bound for Antarctica.

On June 15, 1863, President Abraham Lincoln issues a proclamation in which he calls for the mustering of new militia in the Mid-Atlantic states of Maryland, West Virginia, Pennsylvania and Ohio—in part to help protect Washington, D.

Representatives of Great Britain and the United States sign the Oregon Treaty, which settles a long-standing dispute with Britain over who controlled the Oregon territory.

On June 15, 1776, the Assembly of the Lower Counties of Pennsylvania declares itself independent of British and Pennsylvanian authority, thereby creating the state of Delaware.

On June 15, 1775, the Continental Congress votes to appoint George Washington, who would one day become the first American president, the commander of the colonies’ first official army.

Wat Tyler, leader of the Peasants' Revolt that rocked England, was stabbed and later beheaded on this day.