http://www.dailymail.co.uk/news/art...hs-uncontacted-tribes-firing-bows-arrows.html These guys are located in a remote section of a rainforest and are only seeing an airplane for the first time. Or rather, the second--the plane passed by this area before, but nobody believed the tribe was there. According to the article, there are about a hundred such tribes left in the world, mostly in South America. As much as history shows we should probably leave them alone, that may be decided without our permission. Deforestation continues to this day, whether legally or not, and several of the tribes are hunting on land other people have purchased and want cleared. The biggest danger here is that these people, like the Native Americans when they got introduced to settlers, have no immunity to the common cold and would probably die from an outside visit.