no need for a cruise missle, but air strikes could be a possibility, IF it's an isolated compound. I guarantee you IF it is a US group, very, VERY few other Americans will support them, or hide them away. In other words, military action won't be necessary like it will be in the case of Bin Laden. Why bomb a town when you can just send in the FBI and arrest them? That's a possibility here. However, in Afghanistan or Palestine, do you honestly think we could just send in a team and the locals would help in pointing out where the terrorists were? No, it would require a different strategy.
I didn't mean to use the exact same strategies and armed force branches. I meant deal with them in the same way as bringing them to justice. In other words, they will pay for this with their lives one way or the other, whether it be through military action or death as a punishment for treason.
However, if it is US terrorists and they have a Waco like compound... then by all means bomb it or take it by military force. What happened yesterday is an act of war. If it was done by American citizens, well, there's a word for it, treason, and a punishment for it, death.