Contact: Lynn Chandler
NASA/Goddard Space Flight Center
Caption: The last three of the 18 flight primary mirror segments arrived at NASA's Goddard Space Flight Center in Greenbelt, Md., on Dec. 16, 2013. After traveling across the country, the mirrors were prepped to enter a Goddard clean room for inspections.
Credit: NASA Goddard/Chris Gunn
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Related news release: Final James Webb Space Telescope mirrors arrive at NASA