NPR News Now covers the U.S. resuming a naval blockade of Iran, escalating tensions amid conflicting ceasefire statements. An ICE officer in Maine killed a man during a warrant service, sparking protests and marking the second deadly incident in a week. Dozens of states are suing to block the Paramount-Warner Bros. merger, citing antitrust concerns. Other stories include a $27 million penalty for a Keystone Pipeline spill, undisclosed influencer song promotions, and economists urging AI regulation.