"This NASA TV video grab image obtained on October 5, 2017 shows astronauts outside the International Space Station repairing the robotic arm (top). Two NASA astronauts embarked on a spacewalk Thursday to repair the International Space Station's aging robotic arm, the US space agency said. The outing by Americans Randy Bresnik and Mark Vande Hei began at 8:05 am (1205 GMT) when the duo switched their bulky white space suits to battery power before floating out of the airlock.The two men will focus on removing and replacing the latching end of the Canadian-made arm, known as Canadarm2.  / AFP PHOTO / NASA TV / Handout / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT ""AFP PHOTO / NASA TV/HANDOUT"" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS"
{}