Lewis and Clark's Shoshone guide Sacajawea gave birth to a son, Jean Baptiste.
Robert Fulton patented the steamboat.
Saint Bernadette of Lourdes first saw a vision of the Virgin Mary at Lourdes, France, leading to the foundation of the shrine of Lourdes.
Lateran Treaty was signed, with Italy recognizing the independence and sovereignty of Vatican City.
Yalta Agreement signed by President Franklin Roosevelt, British Prime Minister Winston Churchill, and Soviet leader Josef Stalin during World War II.
Japan became the fourth country to put a satellite into orbit.
Ayatollah Khomeini's followers seized control of the Iran government.
The Episcopal Church Boston diocese consecrated Barbara Harris as the church's first woman bishop.
South African resistance leader, Nelson Mandela, was released from prison after more than 27 years.
As a result of the Arab Spring protests, Egyptian president Hosni Mubarak announces his resignation and hands power of the country over to the military.
Pop star Whitney Houston died at the Beverly Hilton hotel in Los Angeles, the night before the annual Grammy Awards.