Research by the Costs of War Project are cited in an op-ed by Senators Bernie Sanders (I-VT) and Mike Lee (R-UT). "It is time for Congress to ask whether, nearly 18 years after 9/11, we really want to continue to be involved in these wars for another 18 or more. According to a recent study by the Costs of War Project at Brown University, the War on Terror will have cost American taxpayers almost $5 trillion through Fiscal Year 2019."
April 5, 2019 USA Today