Alabama became the 22nd state to join the United States of America.
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The European Union formally opened accession negotiations with Ukraine.
At 2 PM EST, there was a 10 minute moment of silence in memory of John Lennon.
The Dayton Agreement was signed in Paris by leaders of various governments. This ended the conflict in the former Yugoslavia.
Star Wars: The Force Awakens, directed by J.J. Abrams, had its world premiere at the TCL Chinese Theatre in Los Angeles.
The Mariner 2 space probe completed the first-ever flyby of Venus.
