Rare Video of little known event (kept hidden?) President Reagan Thanking the Blessed Mother and the Children of Fatima at Fatima Shrine

Source : While watching a documentary several years ago about the miraculous occurrences at Fatima that happened in 1917, I saw a media clip featuring President Ronald Reagan mentioning the three children seers specially chosen to impart an important message to the world given by the Mother of God.
However, not only was I stunned upon hearing such a reference, the clip went by so fast before I could figure out when and where the President of the United States would make an unexpected public reference to something of this spiritual magnitude, originating from Catholic mysticism no less. I’ve never heard it mentioned since, not even on Portuguese television all the years I’ve lived here so far, perhaps I should have done a thorough Google search!