@ossobuco,
Stimulated by something peripherally connected to all this that I was reading, I was reminded of a very bright observation made by Chomsky after the Arms to Iran revelations. He noted how Casey had gone covert, lied to congress, etc because of what had changed in America in the 60s. Previously, the CIA didn't have keep the dirty or criminal portions of their operations very secret because Americans just trusted them and weren't paying attention. But with the 60s and the questioning of prior assumptions (re America's footprint in the world along with much else) the CIA and other such operations had to hide the nasty stuff and lie about it - even to other branches of government.
The sorts of excuses I read above for what America has recently been getting up to really are pretty close to the sorts of claims made by Ollie North then and later. Must be odd company to find oneself in.