Q&A with Kurt Eberly, Orbital ATK’s Antares deputy program manager

The Dragon supply ship set for liftoff from Florida next month was the last of SpaceX’s first-generation cargo capsules off the production line, meaning future logistics deliveries to the International Space Station will fly on recycled spacecraft until a new Dragon variant is ready.

SpaceX’s next Falcon 9 rocket is being readied for liftoff Aug. 14 on a space station resupply run. The two-stage rocket completed a hold-down engine firing Thursday at launch pad 39A at NASA’s Kennedy Space Center in Florida.

A solid-fueled Minotaur 4 rocket lifted off from Wallops Island, Virginia at 9:46 a.m. EDT (1346 GMT) Wednesday. The four-stage rocket, comprised of retired Peacekeeper missile parts, launched on a mission to deliver four classified payloads into orbit for the National Reconnaissance Office.