NASA astronaut Rick Mastracchio on EVA to repair cooling system

NASA astronaut Rick Mastracchio stands on the International Space Station's robotic arm during an urgent spacewalk to fix the station's vital cooling system.

This NASA graphic shows the position for QD operations.

A NASA graphics show the starboard pump module worksites on the International Space Station and how the starboard pump module removal will take place outside the International Space Station, scheduled for Dec. 21, 23 and 25, 2013.