Orbital ATK Purchases Second Atlas-V from ULA, Prepares for Return to Space Station

The first two RDR-181 engines are installed on a modified Antares core stage. Photo Credit: NASA / Terry Zaperach

While Orbital ATK remains on track to return their Antares rocket to flight early next year, the company announced it will purchase a second Atlas-V rocket from United Launch Alliance (ULA) to fly an additional [...]