It didn’t take the Brussels bombings to convince most experts that the terrorist threat to Europe is greater than that to the U.S. homeland. The November 2015 Paris attacks, the January 2015 Charlie Hebd...

PDF version A Review of Michael V. Hayden, Playing to the Edge: American Intelligence in the Age of Terror (Penguin 2016).

Editor's Note: The Islamic State produces potent propaganda, inspiring tens of thousands of Muslims to travel to Syria to fight and encouraging other Muslims to launch attacks in their home countries. Th...