Steve Holmes, an engineer with NASA and head of the Flange Unit at the NASA-Michoud Assembly Facility, examines foam from tests in New Orleans January 11, 2005. Holmes was part of a team of engineers that helped re-design the Space Shuttle's external fuel tanks after a piece of foam insulation doomed the Space Shuttle Columbia in February 2003. In spite of two and a half years of work and millions of dollars of research, the new foam design apparently did no better. NASA announced that because of the foam that fell off Discovery on it's liftoff, the entire fleet has been grounded until further notice. Below, Holmes stands with an upper section of the Discovery's fuel tank being insulated with foam last January.

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