NAVAL AIR STATION PATUXENT RIVER, MD -- The navigation system on the MQ-8B Fire Scout is to blame for the loss of an aircraft in Afghanistan earlier this year, leading officials to institute "improved maintenance procedures" to keep it from happening again, the program manager said here today. Capt. Patrick Smith told reporters at nearby Webster Field that the investigations into two MQ-8B mishaps in March and April were complete, and the aircraft had returned to flight within a month...