Russian cosmonauts complete successful spacewalk to replace ISS equipment.
Russian cosmonauts Sergey Prokopyev and Dmitry Petelin spent six hours outside the International Space Station to dispose of three no longer needed devices, including a spent science experiment, and install new hardware, including a mono block for a new high-speed data unit. They also photo documented the condition of the plume deflectors at the aft end of Zvezda service module for later analysis by Russian engineers on the ground. The spacewalk ended with Prokopyev and Petelin back inside Poisk after working for 6 hours and 24 minutes in the vacuum of space.