RT @OrbitalSciences: #Antares launch window on April 17 from 5:00 to 8:00 p.m. (eastern). First launch for @NASA COTS R&D program
RT @OrbitalSciences: #Antares launch window on April 17 from 5:00 to 8:00 p.m. (eastern). First launch for @NASA COTS R&D program