On this day — May 16

hitting the towns of Somerset and London.

Kenya.

launched from the Kennedy Space Center on the 25th and final flight for Space Shuttle Endeavour.

the President of Zaire, flees the country.

She is the first British monarch to address the U.S. Congress.

Everett Koop states that the addictive properties of nicotine are similar to those of heroin and cocaine.

killing 35.

Venera 5, a Soviet space probe, lands on Venus.

marking the beginning of the Cultural Revolution.

at Hughes Research Laboratories in Malibu, California.