Time’s up. President Vladimir Putin had until midnight Tuesday to explain how a military-grade nerve agent manufactured in Russia came to be used in an attack on British soil that left a former Russian double agent and his daughter hospitalized. Instead, Moscow demanded access to case files before answering, and now U.K. Prime Minister Theresa May has outlined retaliatory measures, including sanctions and the expulsion of 23 Russian diplomats. U.K. ministers will also be skipping the World Cup. Meanwhile, British police are investigating the unexplained death of Nikolai Glushkov, an exile in the U.K. and noted Putin critic.