With his feet secured on a platform connected to the remote manipulator system RMS robotic arm of the Space Shuttle Columbia, astronaut Michael J. Massimino, mission specialist, hovers over the shuttle's cargo bay while working in tandem with astronaut James H. Newman, mission specialist, to replace the Reaction Wheel Assembly in the Hubble Space Telescope HST during the STS-109 mission's second day of extravehicular activity EVA.
