364-Roman Emperor Valentinian I appoints his brother Flavius Valens co-emperor

1854-Great Britain and France declare war on Russia, expanding the Crimean War

1910-First seaplane takes off from water under its own power, piloted by Henri Fabre from the Étang de Berre lagoon at Martigues, France

1939-Spanish Civil War ends, Madrid falls to the Nationalists headed by Francisco Franco

1946-Cold War: The United States State Department releases the Acheson-Lilienthal Report, outlining a plan for the international control of nuclear power.

1979-A partial meltdown at Three Mile Island nuclear plant in the US results in the release of radioactive gas and iodine into the atmosphere but no deaths

2018-North Korea's Kim Jong-un meets Chinese leader Xi Jinping in Beijing, China, his first trip outside of North Korea since coming to power in 2011