• NASA is giving Boeing's Starliner another chance with a planned uncrewed mission.
• The mission aims to prove that Boeing has addressed previous issues.
• NASA plans to certify ULA's Vulcan Centaur to launch Starliner.
• The agency sees Starliner as an important part of its future crew transportation plans.

This decision may indicate NASA's desire to maintain a diverse range of crew transportation options, which could benefit Boeing and the commercial crew program as a whole. The certification of Vulcan Centaur suggests a focus on long-term sustainability and reliability, which could strengthen NASA's position in the face of emerging commercial spaceflight capabilities.