STAGE-1 (STudent Artificial Gravity Experiment 1), the University of Colorado design team for the Mars Society Translife mission, gave their final briefing of the year on Thursday, May 9, completing the first year of design, implementation and testing of the ISS (International Space Station) centrifuge ground unit. The STAGE-1 team began design in September 2001 of the ground prototype unit, intended to demonstrate the feasibility of key concepts necessary for placing an artificial gravity centrifuge on the International Space Station. STAGE-1, a roughly 1 meter diameter unit, was designed and built to demonstrate these concepts, namely three key ISS verifiables including life support, active mass balance control and spin control.