Later today the city of Dallas will host a ceremony to mark the moment, 50 years ago, when a sniper fired three bullets at President Kennedy's motorcade.
Two hit their target and the world was changed forever.
Americans of that generation, now mostly retired, will always remember where they were when the news broke of the assassination.
That day in Dallas occurred at the intersection of political tumult, a horrifying news event and the birth of television news.
So the killing of a youthful and optimistic President was captured on video and became etched into the soul of America.
The legacy of John F Kennedy was magnified exponentially by his tragic death. Historic civil rights legislation was passed as a posthumous tribute.
Americans pursued his dream of the Peace Corps, of reaching the moon, and they believed - unlike many of Kennedy's Generals - that the Cold War could be contained.
There is another feature from 50 years ago that has endured: The conspiracy theory and a deep distrust of government.
Even today, 62% of Americans do not believe that a single sniper killed President Kennedy Most believe there was a cover-up.
Even his nephew, Robert Kennedy Jr, told me this week that he doubts the official version of the assassination.
Of course whether the CIA was to blame, or the Mafia, or the Russians, or the Cubans - that is still fiercely debated.
We may never know what really happened, and who was behind it, but as America lost its youngest ever President, this country was catapulted into a world of grief and scepticism.
John F Kennedy's legacy is profound and enduring.
Democrats still pay homage to his extraordinary charm and charisma. Strategists still admire his handling of The Cuban missile crisis.
Americans still rank him as one of the nation's most popular presidents.
We will never know if Kennedy would have saved America from the quagmire of Vietnam or what his second term would have looked like.
But we do know that JFK, despite facing virulent opposition in some quarters, had a remarkable hold over the imagination of Americans.
Those two bullets, while killing a President, has not changed that. Today's ceremonies will show the special relationship between Americans and their 35th President remains undimmed.