Their clothes had been replaced by a new uniform ? drab veils of black and grey. One of the girls stepped forward amid the Koranic chanting to state that she and her classmates are unharmed. But her eyes and shaky voice told a story of fear and duress. Almost a month after they were abducted from their school in northern Nigeria, the first evidence of the fate of about 130 of the stolen girls of Chibok emerged yesterday after Boko Haram released a video alleging the teenagers had converted to Islam. In a 27-minute film combining purported footage of the schoolchildren with separate footage of its confident leader, the Islamist terror group offered to release some of the girls in return for...