SpaceX launches Northrop Grumman mission to ISS
SpaceX successfully launched a resupply mission for the International Space Station on Sunday after it was postponed Saturday because of unfavorable weather. The space exploration company used a Falcon 9 rocket to launch the Cygnus spacecraft made by Northrop Grumman - best known as a defense contractor. Northrop Grumman changed its launch vehicle for Cygnus missions from its ow