Strike price: missiles fall in Poland

How did apparently Russian-made munitions kill two people on NATO soil? An accident in the fog of war seems likely, but listen closely: the immediate international response has been telling. Donald Trump has announced he will run for the American presidency again; we ask about his chances and his motivations. And we take you inside India’s tangled hair industry. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer