Here's an idea.

Let's invade a country because they are a "threat" to us. Though no evidence of such will ever be found.
We will do so also because their leader is horrible, and we are going to bring them democracy and our level of freedom.

Then, we will prop up a government of our making. All part of a global war on the most nasty of nasties, the terriers.

In the interim, we'll just happen to kill a whole bunch of civilians (100,000?). Whoops.

Then (as Joe in the comments reminded me), we claim they have used chemical weapons on their own people. Then we get caught with them. After denying it, of course..

And we'll set up camps and gulags there and around the world where the CIA can send people outside the realm of the Geneva Conventions and torture them, but not get caught.
Until now: CIA under investigation in Europe (Whoops)

Oh, this is good: some of the people part of the new theocratic government will interogate and torture, but no one will know about it.
Until now: Torture widespread in Iraq bunker: ex-detainee (whoops, again!)

Hey, motherfuckers, freedom isn't free!