Costs of War: After 9/11 Attacks, U.S. Wars Displaced at Least 37 Million People Around the World

As the United States marks 19 years since the September 11 terrorist attacks that killed nearly 3,000 people, a new report finds at least 37 million people in eight countries have been displaced since the start of the so-called global war on terrorism since 2001. The Costs of War Project at Brown University also found more than 800,000 people have been killed since U.S. forces began fighting in Afghanistan, Iraq, Syria, Pakistan and Yemen, at a cost of $6.4 trillion to U.S. taxpayers. "The U.S. has played a disproportionate role in waging war, in launching war and in perpetuating war over the last 19 years," says report co-author David Vine, a professor of anthropology at American University.