On Tuesday's show, Bill Gertz, National Security Columnist for the Washington Times and Senior Editor of the Washington Free Beacon, joined Sean. He has been on the forefront of how modern warfare is being fought not on the ground, but in digital space—and how America is falling behind. We are facing severe threats from China, Russia, Iran, and insurgent terrorist groups, but do not have the infrastructure or the right leadership to properly combat these powers.

Gertz' new book, iWar: War and Peace in the Information Age, is goes on sale today. For more information click here.