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-