A series of incredible images are the very first sighting of a reclusive Amazon rainforest tribe that has remained hidden from the rest of the world . The images - captured by automatic cameras in Brazil's rainforest - show a group of men, some of them wearing loincloths and carrying sharpened sticks, are seen picking up machetes and other weapons left at the site by agents from Funai - Brazil's indigenous peoples' agency. The number of men reportedly proves that the tribe - named Massaco after