The American Film Institute originally published a list of the top 100 greatest American movies of all time in 1997. When the list was first published there was only one animated feature on the list. When the 10th Anniversary list was published in 2007, one more animated film made the cut. Not surprisingly, both films are Disney features. Name both of them. *Hint* Both films were major firsts for Disney.
(I'll update with the answer eventually ;) ).