Also don't forget the US government were pretty hot on extraordinary rendition not so long ago - which is illegal even in the US -but has anyone actually been prosecuted for those offences?
@Carol - Minor point: On this, I think you're equating the ideology and actions of one (arguably rogue) administration
with the attitudes and beliefs of the rest of the government and the people
of the United States.
Extraordinary rendition (i.e. kidnapping), experimental interrogation techniques (i.e. physical and psychological torture), and extralegal detention (i.e. Camp X-Ray @ Guantanamo Bay) do not sit well with the vast majority of Americans, or members of its government, virtually all of whom clearly recognise such things for the dangers they pose to the rule of law and human rights.
The vast majority of the people of the United States are not behind, or supportive in any way, of the excesses of the Bush-Cheney administration. Which is why that same administration went to such great lengths to hide these things from the American public - and to engage in a deliberate campaign of legal chicanery, misdirection, and obfuscation once they did became public knowledge.
Point two: Has anybody been prosecuted? No. And they probably never will be.
Governments generally don't turn on their own - no matter how egregious the offences committed. That's why most war and government criminals escape punishment unless an outside tribunal (Nuremberg, the ICC, et al) somehow manages to prosecute. And usually over the objections of one or more countries.
That's because many countries, including the so-called civilised law-abiding western democracies, have all been guilty of similar offences at one time or another. And realise the wisdom to be found in the biblical admonition: Judge not lest you be judged.
I think the best we can ever hope for is that an abuse or injustice, done with the authority and consent of a government, simply be stopped. Beyond that, I'm not too hopeful - either that it doesn't happen again - or that those responsible be brought to book. There's not sufficient commitment or will within the law to go after everyone who's guilty. And the general public tends to quickly tire of the spectacle after 'first blood' is obtained.
Sad really. But that's the way it always seems to go.