Russia needs to carpet bomb the entire country and clean house, assuming we have no special forces in or near the target zones.
Obamas weakness has forged a Franco-Russian allance. Wait til the Charles deGaul Carrier arrives off Syria. The French can be mean SOBs when they want to. Watch—France will sell Putin the Carrier they built—maybe build more. These two acts—The airliner crash and the Paris Attack may well have signed the death warrent for IS (Dash). But, it has made America look silly, childish and weak.