In this explosive book, New York Times bestselling author Bill Gertz uncovers the most significant threat to US national security today: America's enemies—including radical terrorist groups—are arming themselves with the world's most dangerous weapons. And they're doing it with the help of America's supposed allies. Worst of all, the United States has let it happen.

Only Bill Gertz has the contacts and the knowledge to tell the complete story of how France, Germany, Russia, China, and other countries have armed our enemies to the teeth. Treachery is also the definitive account of what the US government is doing to counter the threat—and of how our leaders have too often failed us.