"And you can't get good intelligence against terrorist groups, really good intelligence, without having spies in terrorist groups, " Bremer said.

CNN: Experts: A variety of intelligence factors may have played a role

Cape Town police have set up a special urban terrorist unit, Operation Good Hope, to investigate the incidents.

BBC: Reward for Cape Town bombers' arrest

"We have stopped many of the terrorist plots and attempts from the past through good intelligence, " Rep. Michael McCaul, R-Texas, who chairs the House Homeland Security Committee, told CNN.

CNN: Past bombings prepared response in Boston

On foreign policy, perhaps the most important issue, Mr Bush has transformed American policy in response to the terrorist attacks and (less noticed) has established good relations with the great powers of Russia, China, India and Japan.

ECONOMIST: Introduction: How to pick a president | The

One study of the Red Brigades, the Italian terrorist group of the nineteen-seventies, found that seventy per cent of recruits had at least one good friend already in the organization.

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