
RIO DE JANEIRO, Brazil -- Brazil's government agreed to release stunning photos of Amazon Indians firing arrows at an airplane so that the world can better understand the threats facing one of the few tribes still living in near-total isolation from civilization, officials said Friday.

The boreal forest wraps a green halo around Russia, Scandinavia and Canada. In North America, the band of green extends from Alaska to Newfoundland, bordering the tundra to the north and touching the Great Lakes to the south.