CBSnews.com: As FBI investigators search for new leads as to who was behind the deadly Boston Marathon bombings, it seems al Qaeda is equally perplexed.
CBSnews.com: As FBI investigators search for new leads as to who was behind the deadly Boston Marathon bombings, it seems al Qaeda is equally perplexed.
CBS News senior correspondent John Miller, a former assistant FBI director, says investigators are focusing on photos taken immediately before the bombing and others showing what appear to be parts of the detonated devices.