Today in History – April 25

1945 – The last German troops retreat from Finland’s soil in Lapland, ending the Lapland War. Military acts of Second World War end in Finland.
1951 – Korean War: Assaulting Chinese forces are forced to withdraw after heavy fighting with UN forces, primarily made up of Australian and Canadian troops, at the Battle of Kapyong.
1953 – Francis Crick and James Watson publish “Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid” describing the double helix structure of DNA.
1954 – The first practical solar cell is publicly demonstrated by Bell Telephone Laboratories.
1959 – The Saint Lawrence Seaway, linking the North American Great Lakes and the Atlantic Ocean, officially opens to shipping.
1960 – The United States Navy submarine USS Triton completes the first submerged circumnavigation of the globe.
1961 – Robert Noyce is granted a patent for an integrated circuit.
1972 – Vietnam War: Nguyen Hue Offensive: The North Vietnamese 320th Division forces 5,000 South Vietnamese troops to retreat and traps about 2,500 others northwest of Kontum.
1974 – Carnation Revolution: A leftist military coup in Portugal overthrows the authoritarian-conservative Estado Novo regime and establishes a democratic government.
1975 – As North Vietnamese forces close in on the South Vietnamese capital Saigon, the Australian Embassy is closed and evacuated, almost ten years to the day since the first Australian troop commitment to South Vietnam.
1981 – More than 100 workers are exposed to radiation during repairs of at the Tsuruga Nuclear Power Plant in Japan.
1982 – Israel completes its withdrawal from the Sinai Peninsula per the Camp David Accords.
1983 – Cold War: American schoolgirl Samantha Smith is invited to visit the Soviet Union by its leader Yuri Andropov after he read her letter in which she expressed fears about nuclear war.
1983 – Pioneer 10 travels beyond Pluto’s orbit.
1986 – Mswati III is crowned King of Swaziland, succeeding his father Sobhuza II.
1988 – In Israel, John Demjanjuk is sentenced to death for war crimes committed in World War II.
1990 – Violeta Chamorro takes office as the President of Nicaragua, the first woman to hold the position.
2001 – Michele Alboreto is killed while testing an Audi R8 at the Lausitzring in Germany.
2004 – The March for Women’s Lives brings between 500,000 and 800,000 protesters, mostly pro-choice, to Washington D.C. to protest the Partial-Birth Abortion Ban Act of 2003, and other restrictions on abortion.
2005 – The final piece of the Obelisk of Axum is returned to Ethiopia after being stolen by the invading Italian army in 1937.
2005 – Bulgaria and Romania sign accession treaties to join the European Union.
2007 – Boris Yeltsin’s funeral: The first to be sanctioned by the Russian Orthodox Church for a head of state since the funeral of Emperor Alexander III in 1894.
2015 – Nearly 9,100 are killed after a massive 7.8 magnitude earthquake strikes Nepal.