To the moon, via the space station? A Q&A with Orbital ATK

It's been two years since the spaceflight company Orbital ATK lost one of its Antares rockets in a jaw-dropping accident on the Virginia coast. On that day, a liquid oxygen turbopump feeding one of the rocket's Soviet-built AJ-26 engines exploded, sending the rocket plunging back to the launch pad seconds after liftoff. The cargo, an International Space Station-bound spacecraft named Cygnus, was destroyed in the ensuing fireball. Orbital decided to swap the AJ-26 for a modern Russian engine, the RD-181. While the company was making the switch, it outsourced two Cygnus flights to United Launch Alliance. All that's now ancient history—at least, that's what Orbital and NASA hope. More

(Source: The Planetary Society - Oct 14)