NASA plans to complete by the middle of March a contingency plan for ensuring access to the International Space Station should its two commercial crew partners suffer additional delays. In a response included in a U.S. Government Accountability Office report issued Feb. 16 , Bill Gerstenmaier, NASA associate administrator for human exploration and operations, concurred with a report recommendation that NASA develop alternative ways of getting astronauts to and from the ISS if commercial crew vehicles are not certified once NASA’s current contract with Russia for Soyuz flights expires at the end of 2018.