With the support of investors, Federal money and private donors, many tribes are building economies.

The tribe can build a casino if it gets federal approval and signs a compact with the state.

The tribe has also built some needed housing.

The next thing you know the tribe will build them a house, and then they'll say they've been there for 30 years.

This money helps the tribes build environmental protection capacity and clean up dump sites.

"The tribes build their villages as far from the mountain as they can."

The two tribes form a five members team each and build a raft for their immunity challenge.

Maybe a roving tribe of Stygians built it long ago.

The tribe is also building a 10,000-seat arena and a 1,200-room hotel.

To the west, the same tribes might have built hunting camps to hunt winter game, including seals.