In 1767, the boundary between Delaware, Maryland and Pennsylvania (the Mason-Dixon Line) was established.

In 1962, Drs. James Watson, Francis Crick and Maurice Wilkins won the Nobel Prize in medicine/physiology for uncovering the double-helix structure of DNA.

In 2001, four al-Qaida members were sentenced to life in prison for bombing the U.S. embassies in Kenya and Tanzania in 1998.

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