The Marine Corps has started the process of determining how the V-22 tiltrotor aircraft will affect the surrounding environment if it is based at air stations in Arizona and California. Several facilities are being evaluated as possible basing sites for nine Osprey squadrons, according to a notice posted in today's Federal Register . "To date, five installations have been identified as potential receiving sites: Marine Corps Air Station (MCAS) Camp Pendleton, MCAS Miramar, MCAS Yuma, Naval Air Facility El Centro,...