Several thousand Muslims have gathered at one of western Europe's largest mosques to condemn the US preacher who planned to burn copies of the Koran. Hadrat Mirza Masroor Ahmad, world head of the Ahmadiya Muslim Community, addressed millions more via a live telecast from the Baitul Futuh Mosque, in south west London. He said 'extremism' was 'never a true reflection' of any religion.Duration: 01:20