New York Times: The indigenous leaders had a plan. They would unite for a last, desperate stand against the mammoth dam threatening their lands in the Amazon, vowing to give their lives, if necessary, to prevent it from being built. “This will be our last cry for help,’ said the chief of the Arara tribe, José Carlos Arara, after a meeting of leaders from 13 tribes last month. “We are not here to kill. We are here to defend our rights.’ For a moment this week, it looked as if they had won an …