Program on International Policy Attitudes (PIPA)The US's 'war on terror' has failed to weaken its prime target al Qaeda, according to people in 22 out of 23 countries surveyed in a new poll for the BBC World Service. On average only 22 per cent believe that al Qaeda has been weakened, while three in five believe that it has either had no effect (29%) or made al Qaeda stronger (30%).International securityUnited Statesal QaedaArticle