Airstrikes, even if they worked to check ISIS, would have to be used repeatedly over time. And more training for the Iraqi military -- most likely with advisers on the ground to instruct in the use of sophisticated military equipment -- would be necessary. And despite all of this, it's likely that ISIS may still be able to secure enclaves in Iraq. Haven't we seen this movie before? It was called Iraq 2003-2011, and it clearly didn't have a happy ending.