Langewiesche article
Take the Langewiesche article with a grain of salt, or perhaps a pillar of salt.
He did not bother to speak to Joe Sharkey, the NY Times columnist who was aboard the Legacy. Joe was pissed about the article, the Brazilian Air Force phoned me about it, also pissed.
He manages to misspell an extremely common Brazilian name, Perreira if I recall, and that's like misspelling "Smith".
He also places a solemn emphasis on the native wisdom of local Indian chief Megaron. I have neighbors who do cultural documentaries. They know Megaron - they've got his email, for example - and inform me when they first met him, fifteen years ago, he tried to steal their canoe.