aerojet alpha magnetic spectrometer apollo spacecraft assembly of the international space station atmospheric reentry demonstrator automated transfer vehicle bill clinton boeing integrated defense systems darpa energia european space agency expendable launch system general electric habitation module hydrazine iss propulsion module iss assembly sequence international space station langley research center lifting body maiden flight marshall space flight center mir nasa nasa office of inspector general north carolina state university orbital space plane orbiter boom sensor system parafoil ralph hall rockwell international scaled composites skunk works soviet union soyuz spacex dragon space shuttle space shuttle challenger disaster space station freedom zarya