ISS028-E-016069 (12 July 2011) --- Wearing extravehicular mobility unit space suits, NASA astronauts Mike Fossum (right), and Ron Garan, both Expedition 28 flight engineers, are assisted by NASA astronauts Chris Ferguson (foreground) and Rex Walheim in the International Space Station's Quest airlock prior to the July 12 spacewalk during which Fossum and Garan egressed the orbiting complex to complete some needed chores.