The internal threat from Muslim extremists in the military extends to high-level Defense Department aides who have undermined military policy. In fact, one top Muslim adviser pushed out an intelligence analyst who warned of the sudden jihad syndrome that led to the Fort Hood terrorist attack. An honored guest of the Ramadan dinner at the Pentagon this September was Hesham Islam, who infiltrated the highest echelons of the Ring despite proven ties to U.S. terror front groups and a shady past in his native Egypt. As senior adviser for international affairs to former deputy Defense Secretary Gordon England, Islam ran...