TODAY IN HISTORY

May 22

1455:The first battle in the 30-year War of Roses took place at St. Albans.

1761:The first life insurance policy in the United States was issued in Philadelphia.

1849:Abraham Lincoln received patent number 6469 for his floating dry dock.

1927:An earthquake near Xining, China, measuring 8.3 claimed approximately 200,000 victims.

1947:Harry S. Truman's Doctrine brought aid to Greece and Turkey to combat the spread of Communism.

1972:Richard Nixon arrived in Moscow, becoming the first U.S. president to visit the Soviet Union.

1972:Ceylon became Sri Lanka.

1992:Johnny Carson hosted the last episode of his Tonight Show.