Q&A with Mark Sirangelo, leader of Sierra Nevada Space Systems

While recovery teams continue combing through the test site at Cape Canaveral where SpaceX’s first space-worthy Crew Dragon capsule was destroyed in an explosive accident last month, engineers a few miles away are pressing ahead with the company’s 17th resupply mission to the International Space Station set for launch early Friday.

Repair crews in Virginia have restored the Antares booster’s launch pad — damaged in an explosive rocket crash nearly one year ago — to flight-ready status as the Orbital ATK launcher moves toward a return-to-flight in 2016.

SpaceX’s ground team hydraulically hoisted a 213-foot-tall Falcon 9 rocket vertical at pad 39A at NASA’s Kennedy Space Center before dawn Monday ahead of a planned liftoff with a space station-bound robotic resupply craft.