The Oribital Space Plane (OSP) is envisioned to be a multipurpose spacecraft that will perform crew rescue vehicle (CRV) and crew transfer vehicle (CTV) missions for the International Space Station(ISS). The OSP will be designed to be compatible with current expendable rockets and future reusable launch vehicles. Boeing Phantom Works is leading the Phase A study effort for OSP. Alternate Access to Station (AAS) is a multi-year effort enabling commercial resupply services for the ISS to supplement the Space Shuttle and other international ISS cargo delivery vehicles.