On June 9, 1999, the North Atlantic Treaty Organization (NATO) and the Federal Republic of Yugoslavia, signed the Kumanovo Treaty, ending the Kosovo War. The agreement also opened the way for the establishment of international security forces to maintain order in Kosovo and a UN protectorate over the region. The parliament of Kosovo subsequently declared independence in 2008.

On June 9, 1969, the US Senate confirmed Warren Burger as chief justice of the United States, succeeding Earl Warren. Read Chief Justice Burger's own account of the events surrounding the confirmation.