No ground troops. That is what ISIS wants. The US would just bleed troops week by week, year by year until they loose the will and attention and demand another withdrawal. Unless you are prepared to be there for 30+ years then forget it as a strategy. It is a war you cannot win. Even Vietnam had more definite targets to shoot at and look how that ended.
I was thinking about this whole thing today and if I could pinpoint when everything went south it would be Abu Graib. That was when the US lost Iraq and the high ground and when ISIS was born. Bush / Blair and the invade now / plan later strategy to nowhere set the future. We should hang those bastards from the nearest lamp-posts.
Everything after that has just been domino's falling toward where we are today. Guerrilla warfare has come full circle and is not an attacking doctrine, not just a defensive, rear-guard action.
Fundamentally, you can't bomb your way to victory against an opponent that hides among civilians. If you want to bomb civilians then roll the dice and nuke Mecca during Ramadan(a-ding-dong) but otherwise stop pretending that anything but a ground force can change things. This needs people kicking doors in, people pointing out the bad guys and triggers pulled.
What we need to do it turn the economic screws on Turkey. They either need to be a true ally or to pay the price. They can't keep playing both sides and treating us like schmucks.