President Jair Bolsonaro campaigned on a promise to overturn the country’s political patronage, but as his popularity has slipped he has come to need it. The latest bids to return to commercial supersonic flight look promisingly quieter, cheaper and perhaps even more sustainable. And our correspondent reflects on the costs of having black hair in a white world. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer

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