America feared that letting Ukraine use US weapons to attack far-off targets in Russia would escalate the conflict. Why has President Joe Biden finally changed his mind? Markets soared when Donald Trump was elected, but the longer-term impact of Trumponomics may be less positive (9:42). And why airships are back in our skies (18:12).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. Hosted on Acast. See acast.com/privacy for more information.