Oct. 21 (UPI) -- On this date in history:
In 1805, in one of history's greatest naval battles, the British fleet under Adm. Horatio Nelson defeated the combined French-Spanish fleet at Trafalgar off the coast of Spain.
In 1879, after 14 months of experiments, Thomas Edison invented the first practical electric incandescent lamp.
In 1948, Western Allies decided to withdraw their condemnation of Russia as a threat to peace on the condition that the Berlin blockade was lifted, accepting a small-nation formula as a "hopeful basis" for solving the Berlin crisis.
In 1966, an avalanche of coal slag cascaded down a Welsh mountainside, burying a school in the town of Aberfan and killing 148 people, mostly young students.
In 1983, Grenada's newly installed military rulers sought to consolidate control as 1,900 Marines steamed toward the Cuban-backed island following a week-old coup that left as many as 15 people dead.
In 2004, the most senior soldier accused in the Abu Ghraib prison abuse scandal in Iraq, Staff Sgt. Ivan "Chip" Frederick, was sentenced to eight years in prison. He was released on parole in 2007.
In 2011, U.S. President Barack Obama announced the United States would withdraw all troops from Iraq at the end of the year and engage in a "normal relationship" with the nation. "After nearly nine years," Obama said, "America's war in Iraq will be over."
In 2018, actor Julia Louis-Dreyfus accepted the Mark Twain Prize for American Humor, telling the audience at the ceremony that laughter proved to be the "best medicine" during her recent battle with breast cancer.