Chinese astronauts Cai Xuzhe and Song Lingdong conducted a spacewalk outside the Tiangong space station.<br /><br />"The primary task was "to install debris protection devices outside" Tiangong to "safeguard its external cables from debris impact," according to China Central Television. <br /><br />Credit: Space.com | footage courtesy: China Central Television (CCTV) | edited by Steve Spaleta
