This Day in History for May 22 – Johnny Carson Signs Off and More

Here’s a look at some interesting events that took place on this day in history:

1906 – The Wright brothers are granted a US patent for their “Flying Machine” (More info)

1947 – The Truman Doctrine provides aid to Greece and Turkey in an effort to combat the spread of Communism (More info)

1972 – Richard Nixon becomes the first US president to visit the Soviet Union (More info)

1992 – After a 30-year run, Johnny Carson hosts ‘The Tonight Show’ for the last time (More info)

2011 – An EF5 Tornado strikes Joplin, Missouri, becoming the single deadliest US tornado since modern record keeping began in 1950 (More info)