Video: Time lapse of ATV’s final departure from ISS

SpaceX rolled out a reused Falcon 9 booster for a hold-down engine firing Wednesday at pad 40 at Cape Canaveral Air Force Station, making the first use of the launch complex since a rocket exploded there in September 2016. The static fire test accomplished Wednesday was a key step in preparations for launch of a space station cargo ship Dec. 12.

Two NASA astronauts and an Italian flight engineer are sheltering in the space station’s Russian segment as mission control analyzes a possible leak of toxic ammonia coolant aboard the complex.

A SpaceX-owned Dragon cargo craft departed the International Space Station at 1011 GMT (6:11 a.m. EDT) Friday, and made a parachute-assisted splashdown in the Pacific Ocean at 1547 GMT (11:47 a.m. EDT) with more than 3,000 pounds of cargo, research specimens and other hardware.