Chinese astronauts take 4-hour spacewalk outside new lab at Tiangong space station

Chinese astronauts Chen Dong and Cai Xuzhe completed a spacewalk Saturday (Sept. 17) outside the Tiangong space station.

Chinese astronauts take 4-hour spacewalk outside new lab at Tiangong space station
Chinese astronauts Chen Dong and Cai Xuzhe completed a spacewalk Saturday (Sept. 17) outside the Tiangong space station.