The news hit on the first day of August of the largest prisoner swap between the United States and Russia since the Cold War, a deal involving over 20 people - including journalists, political dissidents, suspected spies, among others - and after months of negotiations with other European countries who released Russians in their custody as part of the exchange.

We’re going to delve deeper into what may have been going on behind the scenes to make this prisoner swap happen, what this means for U.S. and Russia relations going forward, and if another trade of this magnitude could happen again.

KCBS In Depth Host Mary Hughes and KCBS Radio’s Mike DeWald are speaking with Larry Pfeiffer on all this. Larry is a former senior director of the White House Situation Room and former chief of staff to Director of the Central Intelligence Agency Michael Hayden. He's now the director of the Michael Hayden Center for Intelligence, Policy, and International Security.