A gold rush in the Roraima region of Brazil brought thousands of miners to the area. These miners brought many diseases with them that the Yanomami Tribe was not immune to, thus wiping out 15% of the tribe. The Brazilian Government ordered the eviction of the miners but didn't do a whole lot to enforce the eviction. The President ordered the bombing of illegal air landing strips however, Davi Yanomami (Kopenawa) is concerned that the bombings will not keep the miners away.
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President Postures Under International Pressure: Bombing of Airstrips is Meaningless (Amazon)