Germany banned the denial of Nazi genocide against Jewish people during the Holocaust.
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New York state became the first to require license plates on automobiles.
Romania and Bulgaria signed the European Union's Treaty of Accession, the last step to joining the Union.
Bell Labs demonstrated the first practical silicon solar cell in New Jersey, US.
The Peloponnesian war came to an end when Admiral Lysander and his Spartan armies defeated their Athenian foes.
The Discovery Space Shuttle deployed the Hubble Space Telescope into low-Earth orbit.
