The Marine Corps' MV-22 Osprey tilt-rotor aircraft will not be capable of aerial refueling until 2018, a one-year shift from the expected fielding date laid out in the service's most recent aviation plan. The V-22 Aerial Refueling System, or VARS, is now scheduled to be operational on Marine Corps Ospreys in 2018, service spokeswoman Maj. Lauren Schulz told Inside the Navy July 10. This development reflects a shift from the time line laid out in the Marine Corps' 2015...