The STS-109 crew stands in the White Room outside the entry into Space Shuttle Columbia.

At Launch Pad 39A, the STS-109 crew stands in the White Room, outside the entry into Space Shuttle Columbia, displaying the mission patch and placard. Standing, left to right, are Mission Specialists Richard Linnehan, James Newman, John Grunsfeld and Nancy Currie; Pilot Duane Carey; Mission Specialist Michael Massimino; and Commander Scott Altman. The White Room is an environmentally controlled structure at the end of the Orbiter Access Room that provides access to the orbiter. The crew is taking part in Terminal Countdown Demonstration Test activities that include emergency egress training and a simulated countdown at the pad. Columbia is scheduled to be launched Feb. 28 on mission STS-109, a Hubble Servicing Mission. The goal of the mission 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. . The launch will be the first for Columbia after returning from California where it underwent extensive maintenance, inspections and enhancements. More than 100 upgrades make Columbia safer and more reliable than ever before