The Navy estimates the MQ-25 Stingray unmanned aircraft system -- the service's first operational unmanned aircraft for the aircraft carrier fleet -- will cost $15.2 billion to acquire, up nearly $2 billion from a $13.3 billion price tag the service tallied last year. The Navy advised lawmakers of the cost estimate for the new system in an initial Selected Acquisition Report for the MQ-25 Stingray program sent to Congress in November, according to a government source. The revision sets the...