Successive wars launched after 9/11 have killed at least 4.5 million people and displaced more than 38 million others.

Successive wars launched after 9/11 have killed at least 4.5 million people and displaced more than 38 million others.

In the twenty-five years since 9/11, the U.S. has waged several military campaigns against extremism around the world, resulting in the deaths of almost a million people. What has…