Beijing has introduced new licensing requirements for rare earth exports, effectively bringing trade to a standstill. The move is widely seen as a response to new tariffs imposed by U.S. President Donald Trump. But with China holding a near-monopoly on the mining and refinement of rare earth elements, the decision threatens to disrupt critical supply chains across the defense, medical and healthcare industries. Gracelin Baskaran, director of the Critical Minerals Security Program at the Center for Strategic and International Studies, joins this episode of Zoom In Zoom Out to discuss the importance of rare earth materials and their role in critical supply chains.