Our rendition and torture programs are not governed by the rule of law and are known to take into custody many innocent people. The decision to carry on with these programs even though they are quite flawed is essentially the decision to carry out collateral damage on civilians... on purpose.
Also, don't be deceived and think that "smart" bombs and missles are smart enough to avoid lots of civilian casualties. They may be better than the previous technology was, but they are far from perfect, and considering that they are used outside of an actual war (targeted strikes in mostly civilian areas) there is definitely the deliberate tradeoff being made to commit some very horrible atrocities in the hope that the actual (though still extralegal) target is the one who gets killed.
And, when you consider the horrible regimes we support and fund (yet also turn on when their atrocities are exposed) it becomes clear that the US Government is the largest sponsor of human suffering in the world.
This is too bad, and it's escalated under Obama. Our militarism is out of control to the point where a massive propaganda effort must be used to keep the public supporting it. Smart bombs are actually propaganda bombs, b/c the footage can occasionally be used as part of the "good guy" narrative that is fed to the public.
I'm quite ashamed of this as an American citizen !