Associated Press

On Nov. 22, 1906, the “S-O-S” distress signal was adopted at the International Radio Telegraphic Convention in Berlin.

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

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

In 1963, John F. Kennedy, the 35th President of the United States, was shot to death during a motorcade in Dallas. Vice President Lyndon B. Johnson was sworn in as president.

In 1967, the U.N. Security Council approved Resolution 242, calling for Israel to withdraw from territories it had captured the previous June, and implicitly called on adversaries to recognize its right to exist.