August 23, 2017 Washington Post
The Costs of War project cited in the Washington Post, "This is in addition to about $212.6 billion in direct spending to care for war veterans since 2001, when terrorists’ attacks on the World Trade Center towers and the Pentagon triggered U.S. military campaigns in Iraq and Afghanistan. That figure is an estimate by Neta C. Crawford, a political-science professor at Boston University and co-director of the Costs of War project at Brown University."
"Trump’s Afghanistan troop increase adds to $1 trillion in war costs" - Washington Post