Only fools do.
Let's just look at IRaq. Remember Saddam's WMDs? His uranium? How few troops it would take? Or cost $20 billion? Or how all the governments in the area will collapse into democratic havens?
Remember that intelligence? No thinking person will trust any agency capable of those errors even if hit one once in a while. After all, even a blind hog finds an acorn every once in a while.ssssssssssssssssssssssssssssssssssssssssssssssss