(02/27/2002) - After rollback of the Rotating Service Structure, Space Shuttle Columbia is revealed waiting for launch Feb. 28, 2002, at 6:48 a.m. EST (11:48 GMT) on mission STS-109. In the photo is seen the Orbiter Access Arm stretched to Columbia's cockpit, plus the 'beanie cap' above the external tank. The cap is a vent hood allowing release of gaseous oxygen. A Hubble Servicing Mission, the goal is to replace Solar Array 2 with Solar Array 3, replace the Power Control Unit, remove the Faint Object Camera and install the ACS, install the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) Cooling System, and install New Outer Blanket Layer insulation.