“The easiest day of the air campaign against ISIS was the first day,” said Christopher Harmer, an analyst with the Institute for the Study of War. U.S. pilots knew the locations of ISIS command and control facilities and storage depots, and to an extent the group was taken at least partially by surprise, since it didn’t know the precise time the strikes would begin. “Past that first day or two of easy targets, ISIS predictably dispersed into the civilian population. They quit using high-power radios, satellite and cellphones, starting moving to a dispersed command and control model,” Harmer said.

http://www.thedailybeast.com/articles/2014/11/13/isis-keeps-getting-better-at-dodging-u-s-spies.html – 11/13/2014.