President Harry Truman opened the two-lane White House bowling alley.
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Romania and Bulgaria signed the European Union's Treaty of Accession, the last step to joining the Union.
Kathmandu, Nepal, was devastated by a major earthquake.
Bell Labs demonstrated the first practical silicon solar cell in New Jersey, US.
The Thornton Affair, a skirmish between American and Mexican soldiers in Texas, started a chain of events that led to the Mexican-American War.
Nicaragua elected its first-ever female President, Violeta Chamorro.
