AV-8B Weapon Systems Program Office (PMA-257) is responsible for life cycle sustainment of the AV-8B Harrier weapon systems for the U.S. Marine Corps and its allied partners: Spain and Italy. The program office's charge is to engineer, procure, field, and sustain readiness and capability improvements at a reduced cost to provide a reliable, safe and tactically relevant Vertical/Short TakeOff and Landing (V/STOL) attack capability.