It’s been about four months since President Donald Trump threatened sanctions against countries supplying much-needed oil to Cuba. The country's economy is already struggling with shortages, inflation, rolling blackouts, and the longstanding U.S. embargo. This morning, we'll hear from a sociologist and retired professor at the University of Havana who's lived through nearly every major chapter of Cuba’s modern economy — from the rise of Fidel Castro to the current economic crisis. But first, there's a modern gold rush (but this time for uranium).