Mark Kelly, NASA (IMAGE) NASA/Johnson Space Center Caption STS-121 Pilot Mark Kelly, talks with mission control as he reads a checklist on the aft flight deck (AFD) of the orbiter. Communication delays between Mission Control and crew members during the Comm Delay Assessment that took place during a recent International Space Station increment posed challenges for crew members. Credit Mark Kelly Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.