Syria Update: Implications of Chemical Weapon Use on U.S. Aid Decision
May 1, 2013 - Institute for the Study of War![](https://understandingwar.org/sites/default/files/styles/thumb-wide/public/Syria-AssadBillboard.jpg?itok=wQ3A7naT)
On April 25, U.S. Defense Secretary Chuck Hagel confirmed that the United States had evidence of chemical weapons use by the Syrian regime, albeit with “varying degrees of confidence”