Yukon Territory. 1858 – The first of the Lincoln–Douglas debates is held in Ottawa, Illinois. 1862 – The Stadtpark, the first public park in Vienna, opens to the public. 1863 – Lawrence, Kansas is destroyed by pro-Confederate guerrillas known as Quantrill's Raiders. 1878 – The American Bar Association is founded in Saratoga Springs, New York. 1879 – The locals of Knock, County Mayo, Ireland report their having seen an apparition of the Virgin Mary. The apparition is later named “Our Lady of Knock” and the spot transformed into a Catholic pilgrimage site. 1883 – An F5 tornado strikes Rochester, Minnesota, leading to the creation of the Mayo Clinic. 1888 – The first successful adding machine in the United States is patented by William Seward Burroughs. 1901–present 1901 – Six hundred American school teachers, Thomasites, arrived in Manila on the USAT Thomas. 1911 – The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee. 1914 – World War I: The Battle of Charleroi, a successful German attack across the River Sambre that pre-empted a French offensive in the same area. 1918 – World War I: The Second Battle of the Somme begins. 1942 – World War II: The Guadalcanal Campaign: American forces defeat an attack by Imperial Japanese Army soldiers in the Battle of the Tenaru. 1944 – Dumbarton Oaks Conference, prelude to the United Nations, begins. 1944 – World War II: Canadian and Polish units capture the strategically important town of Falaise, Calvados, France. 1945 – Physicist Harry Daghlian is fatally irradiated in a criticality accident during an experiment with the Demon core at Los Alamos National Laboratory. 1957 – The Soviet Union successfully conducts a long-range test flight of the R-7 Semyorka, the first intercontinental ballistic missile. 1959 – United States President Dwight D. Eisenhower signs an executive order proclaiming Hawaii the 50th state of the union. Hawaii's admission is currently commemorated by Hawaii Admission Day. 1963 – Xá Lợi Pagoda raids: The Army of the Republic of Vietnam Special Forces loyal to Ngô Đình Nhu, brother of President Ngo Dinh Diem, vandalizes Buddhist pagodas across the country, arresting thousands and leaving an estimated hundreds dead. 1965 – The Socialist Republic of Romania is proclaimed, following the adoption of a new constitution. 1968 – Cold War: Nicolae Ceaușescu, leader of the Socialist Republic of Romania, publicly condemns the Soviet-led Warsaw Pact invasion of Czechoslovakia, encouraging the Romanian population