Highlights of this day in history: Scientists discover DNA's double-helix structure; The Branch Davidian standoff begins in Waco, Texas; Swedish Prime Minister Olof Palme assassinated; U2 releases ... more 
Highlights of this day in history: Scientists discover DNA's double-helix structure; The Branch Davidian standoff begins in Waco, Texas; Swedish Prime Minister Olof Palme assassinated; U2 releases its 'War' album. (Feb. 28) less 
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Thu, Feb 28, 2013 12:10 AM EST