At the 125th anniversary of the Battle at Gettysburg, Nearing the end of the Cold War, famous scientist Dr. Carl Sagan would re-dedicate the Eternal Light Peace Memorial. The speech, co-written with his wife Ann Druyan, juxtaposed the weapons of the Battle of Gettysburg with the weapons of subsequent wars, highlighting the increased potential for destruction with each war.  Sagan used the platform he was given to call for nuclear disarmament, underscoring the need to recognize our humanity as brothers and to work toward peace.

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