Georg Michaelis to open negotiations for an armistice to end World War I. 1920 – Ukrainian War of Independence: The Ukrainian Soviet Socialist Republic agree to a truce with the Makhnovshchina. 1923 – The Mandate for Palestine takes effect, creating Mandatory Palestine. 1923 – The Mandate for Syria and Lebanon takes effect. 1923 – The First American Track and Field championships for women are held. 1932 – Last day of the Battle of Boquerón between Paraguay and Bolivia during the Chaco War. 1940 – Two Avro Ansons collide in mid-air over New South Wales, Australia, remain locked together, then land safely. 1941 – During World War II, German forces, with the aid of local Ukrainian collaborators, begin the two-day Babi Yar massacre. 1954 – The convention establishing CERN (the European Organization for Nuclear Research) is signed. 1957 – The Kyshtym disaster is the third-worst nuclear accident ever recorded. 1959 – A Lockheed L-188 Electra crashes in Buffalo, Texas, killing 34 people. 1971 – Oman joins the Arab League. 1972 – Japan establishes diplomatic relations with the People's Republic of China after breaking official ties with the Republic of China. 1975 – WGPR becomes the first black-owned-and-operated television station in the US. 1979 – The dictator Francisco Macias of Equatorial Guinea is executed by soldiers from Western Sahara. 1981 – An Iranian Air Force Lockheed C-130 Hercules military transport aircraft crashes into a firing range near Kahrizak, Iran, killing 80 people. 1988 – NASA launches STS-26, the first Space Shuttle mission since the Challenger disaster. 1990 – Construction of the Cathedral Church of Saint Peter and Saint Paul (better known as Washington National Cathedral) is completed in Washington, D.C. 1990 – The YF-22, which would later become the F-22 Raptor, flies for the first time. 1990 – The Tampere Hall, the largest concert and congress center in the Nordic countries, is inaugurated in Tampere, Finland. 1991 – A Haitian coup d'état occurs. 1992 – Brazilian President Fernando Collor de Mello is impeached. 2004 – The asteroid 4179 Toutatis passes within four lunar distances of Earth. 2004 – Burt Rutan's Ansari SpaceShipOne performs a successful spaceflight, the first of two required to win the Ansari X Prize. 2005 – John Roberts is confirmed as Chief Justice of the United States. 2006 – A Boeing 737 and an Embraer 600 collide in mid-air, killing 154 people and triggering a Brazilian aviation crisis. 2007