Kayapo Chiefs Raoni Metuktire and Megaron Txucarramãe arrived in England last Monday. They found themselves very quickly ushered into the high tech surroundings of the Channel 4 studio! It has been twenty-five years since Chief Raoni was accompanied by rock star Sting on a world tour. Sadly, the threats and problems that existed then are still causing problems, and a giant dam - Belo Monte, which will be the world's third largest - is being built on the Xingu River where he lives. The Chiefs were here to ask for our help. The interview is moving. Paul Mason said on his blog "It’s one of the most amazing encounters I’ve ever had – and one that nobody in the world will be able to have again if we let development and resource speculation destroy what’s left of the world’s indigenous peoples." - See more on Paul's blog Here is the interview with Paul Mason on Channel 4 News: It was a great experience. It was very touching how, with the interview completed, all of Paul's highly professional team just couldn't wait to get selfies of themselves with the chiefs - and that included Paul Mason himself, who was clearly deeply moved by the meeting!