The United States and other nations have spent billions of dollars and invested untold effort, not to mention lives, in a global campaign against Islamist terrorism—and yet the threat landscape is arguably worse now than it was on 9/11. Despite the importance for national security of understanding how to wage irregular warfare effectively, something in the American way of war, the fundamental culture of the US military, prevents us from doing so. William Wechsler and retired Colonel Liam Collins join this episode to discuss the question of what needs to be done to reverse this trend and thus ensure that the United States can recover from the mistakes of the past, restore its credibility, and return to its place of prominence on the global stage.