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Ball engineers who helped build NASA's Deep Impact spacecraft, which is scheduled to collide with Comet Tempel 1 shortly before midnight on July 3 met with reporter Jim Erikson at Ball Aerospace & Technologies in Boulder, Colorado June 17, 2005. Project

Ball engineers who helped build NASA's Deep Impact spacecraft, which is scheduled to collide with Comet Tempel 1 shortly before midnight on July 3 met with reporter Jim Erikson at  Ball Aerospace & Technologies in Boulder, Colorado June 17, 2005. Project