On December 27, 2013 Russian cosmonauts Oleg Kotov and Sergey Ryazanskiy performed a spacewalk to replace equipment on the outside of the International Space Station. The spacewalk began at 13:00 UTC when the cosmonauts opened the hatch of the Russian "Pirs” module of the International Space Station. The cosmonauts, Oleg Kotov and Sergei Ryazanskiy, installed equipment on the hull of the space station including high-resolution cameras to photograph the earth and a foothold for use in future spacewalks. They also detached an old experiment module and threw it overboard into open space. The spacewalk is Kotov’s fifth and Ryazansky’s second. The spacewalk lasted 8 hours and 07 minutes. The 8-hour 07-minute duration set a new Russian spacewalk record, eclipsing the old mark of seven hours and 28 minutes set by two cosmonauts outside the ISS On August 16, 2013. Two NASA astronauts hold the record for longest spacewalk ever conducted, a marathon eight-hour 56-minute excursion in 2001.