Damascus, the Syrian capital that has as many as five million residents in the city and its surroundings, has now gone weeks without water. Al-Qaeda-linked rebels dumped diesel fuel into the water supply. Damascus gets nearly all of its water from one source: Wadi Barada. Wadi Barada has been occupied by rebel groups since 2012, and have made constant threats since then to contaminate the water supply, which they finally did just a couple weeks ago. Damascus has had to resort to using water trucks to supply the people there, as well as individual residents catching rainfall in a geographical...