Every day brings new twists and turns in the diplomatic negotiations over Syria. With last weekend’s announcement of a tentative agreement brokered by Russia to place Syria’s chemical weapons under international supervision, it appears that U.S. military strikes have been avoided -- though unease remains about how completely the Syrian regime will live up to terms of the deal. While the devil is in the details, it’s an encouraging turn of events for those who worry about the effects of a U.S. bombing campaign on the civilian population.