An explosion ripped through a Catholic church during Christmas Mass near Nigeria's capital Sunday, killing at least 25 people, officials said. A radical Muslim sect waging an increasingly sophisticated sectarian fight claimed the attack and another bombing in the restive city of Jos, as explosions also struck the nation's northeast. The Christmas Day attacks show the growing national ambition of the sect known as Boko Haram, which is responsible for at least 491 killings this year alone...