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DALLAS, TX - NOVEMBER 22:  People watch a historical boradcast about the life of former U.S. President John F. Kennedy near Dealey Plaza on November 22, 2013 in Dallas, Texas. Visitors streamed through the John F. Kennedy Memorial on the 50th anniversary of the assassination of U.S. President Kennedy as he rode in a Presidential motorcade in Dealey Plaza.  (Photo by Tom Pennington/Getty Images)
DALLAS, TX - NOVEMBER 22:  People watch a historical boradcast about the life of former U.S. President John F. Kennedy near Dealey Plaza on November 22, 2013 in Dallas, Texas. Visitors streamed through the John F. Kennedy Memorial on the 50th anniversary of the assassination of U.S. President Kennedy as he rode in a Presidential motorcade in Dealey Plaza.  (Photo by Tom Pennington/Getty Images)

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Nation pauses to remembers JFK

Fifty years on, nation pauses to remember John F. Kennedy's death. CNN's John King reports.

Nation pauses to remembers JFK

Fifty years on, nation pauses to remember John F. Kennedy's death. CNN's John King reports.