Soviet cosmonaut Yuri Gagarin completes a successful orbital flight to become the first man in space.
The Biological Weapons Convention is opened for signatures after a draft is presented by the British.
U.S. troops release Army soldier Jessica Lynch from an Iraqi hospital in the first U.S. POW rescue since the Vietnam War.
The Good Friday Agreement is reached, ending thirty years of conflict and formalizing relations between Northern Ireland, the Republic of Ireland, and Britain.
Argentina, Brazil, Paraguay, and Uruguay sign the Treaty of Asuncion, establishing the Mercosur bloc.