RT @SpaceflightNow: The final phase of Atlas 5 fueling is starting with loading of liquid hydrogen into the Centaur upper stage. #TDRS httpspaceflightnow.com/atlas/av043/st…
RT @SpaceflightNow: The final phase of Atlas 5 fueling is starting with loading of liquid hydrogen into the Centaur upper stage. #TDRS httpspaceflightnow.com/atlas/av043/st…