ISS014-E-09635 (12 Dec. 2006) --- Astronauts Joan E. Higginbotham (foreground), STS-116 mission specialist, and Sunita L. Williams, Expedition 14 flight engineer, refer to a procedures checklist as they work the controls of the Space Station Remote Manipulator System (SSRMS) or Canadarm2 in the Destiny laboratory of the International Space Station during flight day four activities.