Supporters of President Hosni Mubarak charged into Cairo's central square on horses and camels brandishing whips while others rained firebombs from rooftops in what appeared to be an orchestrated assault against protesters trying to topple Egypt's leader of 30 years.
Hillary Rodham Clinton was sworn in as U.S. secretary of state.
The South African Apartheid system of racial segregation begins to disintegrate. President de Klerk announced the unbanning of the African Nation Congress (ANC) and his intentions to release Nelson Mandela.
The Treaty of Guadalupe Hidalgo, ending the Mexican War, was signed. In the treaty, Mexico ceded to the United States a huge portion of what is today the American West and Southwest, including California and New Mexico.