Their stealth and clandestine methods of operation allow them to conduct multiple missions against targets that larger forces cannot approach undetected.

CNN: Commentary: Where heroes come from

The clandestine nature of Operation Condor means that its full extent may never be known, but researchers estimate that 50, 000 were killed, 30, 000 were "disappeared" and presumed killed, and 400, 000 were jailed, according to The Center for Justice and Accountability.

CNN: Trial over terrifying 'Operation Condor' under way

Pakistan's alleged co-operation, until very recently, with North Korea's clandestine nuclear ambitions is another thorn in the side of relations with America.

ECONOMIST: So much for a return to democracy | The