Video: Highlights of second Expedition 50 spacewalk

SpaceX’s Dragon cargo craft ended a four-week mission Sunday with a parachute-assisted splashdown in the Pacific Ocean, returning from the International Space Station with more than 3,600 pounds of cargo, blood and urine samples, and specimens from a rodent research experiment aimed at helping patients with catastrophic bone injuries and osteoporosis.

Cosmonauts Sergey Prokopyev and Dmitri Petelin floated outside the International Space Station Wednesday, unbolted an experiment airlock from the Rassvet docking compartment and then connected it to Russia’s Nauka multi-purpose laboratory module in a 7-hour, 11-minute excursion.

The three newest residents of the International Space Station sped into orbit Wednesday aboard a Soyuz launcher after liftoff into an overcast sky over the Baikonur Cosmodrome in Kazakhstan. These photos show the crew putting on their spacesuits and their mid-afternoon launch.