The last jr. high history book that I taught from neglected to mention the Wright Brothers at all—although to be fair, it had a picture of the Flyer. It did have room for a couple of sentences to mark the achievement of the woman who started the first kindergarten class for black kids in Los Angeles, however.
I'm convinced that a reason for removing real history is because they're going to leave these folks behind and can't have them knowing about the real world outside. Just like their ancestors, if they see or hear something modern, they'll be told it's magic.