Potpourri this week with Micah Zenko on the tendency for mission creep in humanitarian interventions and other U.S. military missions, Marc Lynch pushing back on whether arming the Syria rebels would have worked, story on ISIS’ capture of the Mosul Dam and an interesting twist on water and security challenges, bad air in China (I’m shocked) and the challenges the country is finding tapping its shale gas reserves, and, finally, why the lead Sierra Leone doctor fighting Ebola didn’t get the experiment treatment.