When your hegemony is under threat, you particularly want to rely on accurate information on perceived and actual dangers that are lurking. The US Senate Commission's report into the failure of the CIA only provides us with sorrow that the US public has been deceived in supporting the war in Iraq, but also with dread that the actual danger from terror attacks was not seen coming prior to 9/11.
It's good to watch a rerun of I, Claudius on UKTV. I'd like to imagine Mr GW Bush screaming out "I want my eagles back!" just like Augustus did when his legions were massacred in Germania. Seems like the Roman version of the CIA wasn't up to their job either.