The assassination of President John F. Kennedy | 50 years later

The sign at the John F. Kennedy Memorial in Dallas.  (Larry W. Smith / EPA)

A banner of John F. Kennedy is lowered to the stage before a ceremony to mark the 50th anniversary of his assassination, near Dealey Plaza in Dallas.   (Benny Snyder / Associated Press)

Tatiana Schlossberg, granddaughter of President John F. Kennedy, lays a wreath at his memorial at Runnymede, England.  (Alastair Grant / Associated Press)

People visit the gravesite of President John F. Kennedy at Arlington National Cemetery.  (Nicholas Kamm / AFP/Getty Images)

The eternal flame flickers in the early morning light at the grave of John F. Kennedy at Arlington National Cemetery on the 50th anniversary of Kennedy’s death.   (Jacquelyn Martin / Associated Press)

A woman places flowers at the JFK Tribute in Fort Worth, Texas. People visited the JFK Tribute on the 50th anniversary of the assassination of President John F. Kennedy when he was shot as he rode in a presidential motorcade through Dealey Plaza in Dallas.   (Tom Pennington / Getty Images)