The LDS church is changing a single word in its introduction to the Book of Mormon.
If you go get your Book of Mormon (or go to LDS.com) you'll find the following words in the last sentence of the second paragraph: "After thousands of years, all were destroyed except the Lamanites, and they are the principal ancestors of the American Indians."
But the new version will say, "After thousands of years, all were destroyed except the Lamanites, and they are among the ancestors of the American Indians."
Now if you haven't read the Book of Mormon, this might not seem like such a big deal to you. But the idea that Native Americans are the degenerate offspring of the Lamanite tribe is absolutely central to the Book of Mormon. In fact, other than Jesus showing up now and then in the New World, there just isn't much else to the silliest book every written.
So why did the leaders of the Mormon church drop the teaching about the Lamanites?
Because they had to.
Of course, anthropologists known for many years that Native Americans migrated from Asia thousands of years ago, long before the Jaredites and the Nephites supposedly made their incredible journeys. But recent DNA evidence makes it impossible to deny any longer. The Book of Mormon is wrong; Native Americans did not descend from the Lamanites.
That is what the LDS church is admitting with the 1-word change in the introduction to the Book of Mormon.