<< But who are we going after next? >>
Hell I don't know their names. There is a network of terrorist groups or cells. Each of these cells has a leader, who takes direction from someone else. We want as many as we can get, including those who finance, aid and abet them.
<< Don't we say there are also terrorists in the US? >>
It is believed there are still members of this 'group' in the U.S., there are at any given time terrorists operating in the U.S.
<< If we try to go after other countries without cleaning up our own backyard, how will the rest of the world look at this >>
This seems to presume that we somehow 'tolerate' or 'allow' terrorists in our own backyard, and that we condone their presense. We do not. There is a massive investigation underway to 'clean' up our own backyard.