A year and a half later, a plot of land an acre in size in Runnymede, England was given to the United States to build a memorial for the slain president. Approximately 20 miles west of London, writes Atlas Obscura, Runnymede was also the location of the signing of the Magna Carta 750 years earlier. Granite steps lead up a hill to a Portland stone slab, engraved with a quote from JFK's 1961 inaugural address (via The Kennedy Memorial Trust).
A ceremony to dedicate the memorial was held on May 14, 1965. Queen Elizabeth and Prince Philip attended, along with Jackie Kennedy, Caroline and the now four-and-a-half-year-old John Junior. He climbed the stairs holding the hands of his mother and Prince Philip (via YouTube), and stood between both of them during the ceremony, still with a solid grip on the prince. Brandus also tweeted a sweet photo of that day, with the little boy standing between the two adults holding both of their hands.
By then, Prince Philip now had another young boy of his own, as Prince Edward was born on March 10, 1964 (via Royal UK). While neither Prince Edward or Prince Andrew attended the service, holding the hand of a small child must have seemed second nature to the now father of four.
