The assassination of United States president John Fitzgerald Kennedy on Nov. 22, 1963 led the Toronto Stock Exchange being closed in mid session for first time, ever.
The assassination, by Lee Harvey Oswald, which remains a touchstone in contemporary history, caused stunned reaction around the world.
Although the Warren Commission concluded that Oswald acted alone, conspiracy rumours continue.
In 1964, the first Kennedy half dollar coin was struck, and the design continued in use to this day.
Early coins were struck in silver, more recent ones are struck nickel-clad copper. In 2014 a special edition was struck for the 50th anniversary of the assassination.