Military investigators piecing together what happened in the Iraqi town of Haditha on Nov. 19 -- when Marines allegedly killed two dozen civilians -- have access to video shot by an unmanned drone aircraft that was circling overhead for at least part of that day, military defense lawyers familiar with the case said in interviews. It is unclear whether the video obtained from that day's flight captured the violence, said the lawyers, who have consulted with Marines who were there. One lawyer said investigators have reviewed surveillance footage taken hours after the shootings, which showed the Marines returning to the...