U.S. prison warden: Muslim prayers led to gangs The warden of a U.S. prison holding high-risk inmates, including American Taliban fighter John Walker Lindh, insisted Thursday that he was obeying a court order to allow daily group prayer by permitting inmates to pray in pairs within their cells. Warden John Oliver told a federal judge that when the prison allowed group prayer earlier this year, Muslim inmates formed gangs and bullied other prisoners. Lindh attended the hearing by video conference from the high-security unit that houses him and about 40 other inmates, including several convicted on terror charges. A U.S....