Stunning GoPro: Russian Cosmonaut duo perform 5 hour spacewalk outside ISS

Hardware maintenance may not sound like the most riveting spectacle ... unless it’s happening 400 kilometers above the planet. Russia’s space agency has released a video of two Cosmonauts, Gennady Padalka and Mikhail Kornienko, busy at work outside the International Space Station. The men spent five and a half hours in the hazardous zero-gravity vacuum.