In 1998, radical cleric Abu Qatada, described as Osama Bin Laden’s “right-hand man in Europe”, held a study session at the mosque. He is now in custody in the UK fighting extradition to Jordan to face terrorism charges. Anwar al-Awlaki, an al Qaeda leader killed in Yemen last year, spoke several times at Masjid-al-Tawhid in 2003.