50 years later: The unfulfilled promise of John F. Kennedy and his generation-defining death

The nation marks a half-century since the assassination of President John F. Kennedy. Many who were alive on that fateful day recall exactly where they were and what they were doing.

This is an undated photo of U.S. President John F. Kennedy in Washington D.C.  (AP Photo)

This is an undated photo of U.S. President John F. Kennedy in Washington D.C. (AP Photo)

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