The Seawolf-class was supposed to be America’s answer to a terrifying question: What if the Cold War went terribly wrong? Faster, deeper-diving, and seventy times quieter than anything before it, the Seawolf subs were built to stalk and destroy the most advanced Soviet submarines in existence.But then the Soviet Union imploded. Budgets were slashed. And the Seawolf program—once hailed as the future of undersea warfare—was abruptly canceled.That is – for all but one.The USS Jimmy Carter didn’t just survive. It was completely rebuilt in a secret engineering operation – its steel hull sliced in half and fitted with a bizarre new module. The submarine became a ghost.In 2013, that ghost finally resurfaced – Its steel hull dented and scraped – just long enough to be seen flying a black skull and bones flag. It had returned from a mission so sensitive, so dangerous, that the crew was awarded the Presidential Unit Citation—an honor given only in the gravest moments of national peril.The question remains: what enemy did Jimmy Carter encounter – and defeat – in the silent waters where no witnesses have come forward?