January 27, 1880: <a href="/encyclopedia/science/tech/electrical-engineers/edison-thomas-alva">Thomas Edison</a> was granted a patent for his incandescent light.
January 27, 1944: The Soviets announced the end of the two-year siege of <a href="/encyclopedia/places/baltic-cis/countries/saint-petersburg-city-russia">Leningrad</a>.
January 27, 1945: <p>The Russians liberated <a href="/encyclopedia/places/north-europe/poland/oswiecim">Auschwitz</a> concentration camp, where the Nazis had killed over 1.5 million people, including over 1 million Jews.</p>
January 27, 1951: The U.S. Air Force started atomic testing in the <a href="/encyclopedia/places/north-america/us/nevada">Nevada</a> desert.
January 27, 1967: The <a href="/node/6185">Apollo I</a> fire killed astronauts Grissom, White, and Chaffee during a simulated launch at Cape Canaveral.
January 27, 1973: <a href="/encyclopedia/history/asia-africa/se-asia/vietnam-war">Vietnam War</a> peace accords were signed in Paris.
More events from This Day in History: January 27