This opportunity involves a sole-source order under the Commercial Resupply Services (CRS) 2 contract for end-to-end cargo services to and from the International Space Station (ISS). The contractor must provide launch and landing sites, a launch vehicle, an ISS visiting vehicle, and a reentry vehicle to deliver and dispose of cargo. NASA requires three to four flights per year with cargo deliveries evenly distributed to meet annual upmass and downmass needs. No specific budget amounts, performance location, or non-bid timelines are mentioned in the description. The services support continued ISS operations by transporting both NASA and NASA-sponsored cargo.