Today in History.....November 22

On this day in …

* 1718, English pirate Edward Teach — better known as "Blackbeard" — was killed during a battle off the Virginia coast

* 1906, the "SOS" distress signal was adopted at the International Radio Telegraphic Convention in Berlin

* 1935, a "flying boat", the China Clipper, took off from Alameda, Calif., carrying more than 100,000 pieces of mail on the first trans-Pacific airmail flight

* 1943, President Roosevelt, British Prime Minister Winston Churchill and Chinese leader Chiang Kai-shek met in Cairo to discuss measures for defeating Japan

* 1977, regular passenger service between New York and Europe on the supersonic Concorde began on a trial basis

* 1990, British Prime Minister Margaret Thatcher, having failed to win re-election of the Conservative Party leadership on the first ballot, announced her resignation

* 2004, tens of thousands of demonstrators jammed downtown Kiev, denouncing Ukraine's presidential runoff election as fraudulent and chanting the name of their reformist candidate, Viktor Yushchenko, who ended up winning a revote the following month. ALSO: Iran said it had frozen all uranium enrichment programs; President Bush said he hoped the statement was true but added, "there must be verification."