Video: Cygnus freighter arrives at orbital destination

Two NASA astronauts and an Italian flight engineer took shelter in the space station’s Russian segment Wednesday as mission control analyzed a possible leak of toxic ammonia coolant aboard the complex. Initial data indicated it was likely a false alarm.

Returning home from more than a month in orbit, a SpaceX Dragon supply ship departed the International Space Station and parachuted into the Pacific Ocean on Sunday with nearly two tons of research specimens and hardware, including mice sent up to investigate how spaceflight affects eyesight and locomotion.

The two structural elements of Orbital ATK’s OA-7 Cygnus space freighter were delivered to Kennedy Space Center for final assembly, the packing of cargo and launch to the International Space Station.