How can some Americans still justify this so-called war in Iraq?

It's being going on for four and a half years. What can you honestly say we have done in a positive manner for either Iraq or ourselves? Have you not asked yourselves why the most potent military on the face of the earth can't "win" in Iraq? I mean how long is it going to take for some to realize military action is not the answer to defeating terrorism? Was removing Saddam worth what Iraq has become?