An expert on John F Kennedy has told ITV News that the former President's legacy can still be felt 50 years after his assassination.
US author Larry Sabato said: "the words he uttered as President have influenced not just his successors but the American people and how they approach government".
And he said that a study of Americans' views showed JFK is the most influential modern president and was only rivalled by Abraham Lincoln in US history.
As the world remembers the assassination of John F. Kennedy, many are reviewing his final day and the evidence around his murder.
President Kennedy's assassination left America permanently scarred.
Half a century since the murder of President John F Kennedy in Dallas, America pauses to remember their fallen hero.