LONDON (AP) - The British Broadcasting Corp. said Sunday that David Kelly, a scientist whose apparent suicide intensified a debate over whether the government inflated claims about Iraqi weapons, was its main source for a story at the center of the dispute. "Having now informed Dr. Kelly's family, we can confirm that Dr. Kelly was the principal source" for a story in which reporter Andrew Gilligan quoted an anonymous official as saying the government had inflated claims of Iraqi weapons, the network said in a statement. "The BBC believes we accurately interpreted and reported the factual information obtained by us...