The lost recordings of the 200-inch Hale Telescope dedication ceremony
There are many nice photographs of the dedication ceremony of the 200-inch Hale
telescope on Mount Palomar on June 3, 1948, but apparently the numerous audio and
film recordings of the event are nowhere to be found, according to this post in the
Palomar Skies blog of July 25, 2009:
http://palomarskies.blogspot.com/2009/07/lost-history.html
Let us hope for posterity's sake they are a bit easier to find that the Apollo 11 films.