I'm not belittling this--killing this so-and-so is a major achievement, and everyone involved deserves our thanks. There's a couple less cockroaches on the face of the earth tonight. For a while, things will be a bit better.
However, like killing cockroaches, there's always more to take their place. Sure, al-Zarqawi is dead, but another nutjob will show up to take his place. We need to start killing ants.
"Do what?! Is this guy finally losing it?" Hardly.
If you have ants in your house, you can kill them in the house for weeks with bug sprays, but you'll still have ants in your house. What you need to do is wipe out the ant colony permanently, and that means killing the queen. Kill her, then the colony dies out in very short order.
We need to get bin Laden. Kill him, and the rest is mopping up.