A new bill threatening the independence of anti-corruption agencies has brought Ukrainians onto the streets and rattled international observers. London’s electric bikes are making it ever more a cycling city—and plugging longstanding transport gaps. And a tribute to Ozzy Osbourne, who did perhaps more than anyone to found the genre of heavy metal.Get a world of insights by subscribing 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.