By The Associated Press

Today in History

Today is Tuesday, Dec. 17, the 351st day of 2019. There are 14 days left in the year.

Today’s Highlight in History:

On Dec. 17, 1992, President George H.W. Bush, Canadian Prime Minister Brian Mulroney (muhl-ROO’-nee) and Mexican President Carlos Salinas de Gortari (sah-LEE’-nuhs deh gohr-TAHR’-ee) signed the North American Free Trade Agreement in separate ceremonies. (After President Donald Trump demanded a new deal, the three countries signed a replacement agreement in 2018; it awaits approval by lawmakers.)

On this date:

In 1777, France recognized American independence.

In 1865, Franz Schubert’s Symphony No. 8, known as the “Unfinished” because only two movements had been completed, was first performed publicly in Vienna 37 years after the composer’s death.

In 1903, Wilbur and Orville Wright of Dayton, Ohio, conducted the first successful manned powered-airplane flights near Kitty Hawk, North Carolina, using their experimental craft, the Wright Flyer.

In 1938, German chemists Otto Hahn and Fritz Strassmann discovered nuclear fission by splitting the nuclei of uranium into lighter elements.

In 1944, the U.S. War Department announced it was ending its policy of excluding people of Japanese ancestry from the West Coast.

In 1969, the U.S. Air Force closed its Project “Blue Book” by concluding there was no evidence of extraterrestrial spaceships behind thousands of UFO sightings. An estimated 50 million TV viewers watched singer Tiny Tim marry his fiancee, Miss Vicky, on NBC’s “Tonight Show.”

In 1975, Lynette “Squeaky” Fromme was sentenced in Sacramento, Calif. to life in prison for her attempt on the life of President Gerald R. Ford. (She was paroled in Aug. 2009.)

In 1979, Arthur McDuffie, a black insurance executive, was fatally injured after leading police on a chase with his motorcycle in Miami. (Four white police officers accused of beating McDuffie were later acquitted, sparking riots.)

In 1994, North Korea shot down a U.S. Army helicopter which had strayed north of the demilitarized zone. The co-pilot, Chief Warrant Officer David Hilemon, was killed; the pilot, Chief Warrant Officer Bobby Hall, was captured and held for nearly two weeks.