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

A SpaceX-owned commercial cargo craft splashed down in the Pacific Ocean west of Baja California late Sunday, closing out a 39-day mission that delivered 2.8 tons of supplies, experiments and holiday treats to the International Space Station, and returned home with research specimens and no-longer-needed hardware.

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.

A Russian Progress supply ship sailed to an automated docking Friday with the International Space Station two days after departing the Baikonur Cosmodrome in Kazakhstan, delivering approximately three tons of fuel, spare parts and water to the orbiting outpost and its three-person crew.