A Most Terrible Weapon is a podcast about the dawn of the nuclear age, hosted by Usha Sahay and produced by War on the Rocks, with support from the Carnegie Corporation of New York and the John D. And Catherine T. MacArthur Foundation. In each episode, Usha takes listeners on a journey into the early years of the Cold War, telling stories about the dilemmas nuclear weapons posed for American and Soviet leaders, and introducing a fascinating cast of characters who were all trying to prevent Armageddon in different ways. Along the way, Usha interviews scholars and other nuclear experts to help make sense of the many atomic mysteries that have yet to be solved.

How do you plan for the most destructive war the world has never seen before? After the bombs were dropped on Hiroshima and Nagasaki, American leaders had to figure out how - or whether - nuclear weapons would be used in the wars of the future. In the pilot episode of A Most Terrible Weapon, Usha looks at the very first nuclear war plans, the debates inside the Truman administration about whether the bomb could ever be used again, and a terrifying new development - the arrival of the hydrogen bomb.

Featuring: Dr. Lynn Eden, Dr. Marc Trachtenberg, Dr. Alex Wellerstein