Hurr durr, blow up stuff, invade and install regimes we like.
Obviously you mean it sarcastically, but in all seriousness there are many places where this really should be done. However, we should keep in mind priorities - Iran, not Syria, should be Priority #1.
In Syria, unfortunately, the time window has passed; Russia's been giving Assad very active help and there's a chance of nuclear war if we aid the rebels (brinkmanship, anybody?). We did have a chance during the first rebellion back in early 2011, but we idiotically passed it up attacking Gaddafi, who was much friendlier to the United States than Assad (Gaddafi wasn't Mother Teresa, but I would've thought he's clearly better than Assad).
