The document summarizes NASA's Commercial Crew Program which aims to facilitate the development of commercial spaceflight to transport crew to low Earth orbit. It outlines NASA's transition from traditional cost-plus contracting to public-private partnerships using fixed-price milestone-based agreements. Three companies - SpaceX, Sierra Nevada, and Boeing - are developing crew transportation systems through CCDev and CCiCAP partnerships. The programs have made progress towards the long term goal of safe, reliable, and affordable commercial human spaceflight.