More than 36,000 migrants crossed the English Channel in small boats last year. Our correspondent investigates the increasingly sophisticated business strategies of the criminals who smuggle them. As the planet heats, wildfires in East Asia are becoming fiercer and more frequent (10:36). And why ordinary Americans are falling out of love with their former international allies (18:31).Listen to what matters most, from global politics and business to science and technology—Subscribe to Economist Podcasts+For more information about how to access Economist Podcasts+, please visit our FAQs page or watch our video explaining how to link your account.