Great documentry, that does not seem to be mainstream knowledge at the moment. Spear points carbon dated to around 16,000bc in the Americas and DNA markers of european descent in todays natives are evidence the first natives were europeans , about 5,000 years before the siberian natives crossed over when the ice bridge opened up. The iceflows in the atlantic allowed the europeans to travel back and forth over these iceflows.
Most people have a hard time accepting new evidence like this, its too political and causes upsets in certain communities and we are so used to having that view the first americas came from siberia.
But its really interesting, watch the whole programme its on youtube. Let me know what you think.
Keep an open mind about everything.