This advertisement (below) for the opening of America Sings is one of the oldest Disneyland newspaper clippings I have. I cut it out of the L.A. Times when I was very young and have saved it all of these years.
America Sings opened on June 30th, 1974. On July 8th, just nine days after the opening, a cast member was crushed to death by the rotating walls inside the attraction. I heard about the incident from kids at school, but I hadn't actually read anything in the paper or seen anything on the news relating to it. I decided to write to Disney News Magazine to ask if the story was true. I received this response back from them. The letter is dated, July 25, 1974, and postmarked the following day.