Construction of the two new 24-foot-diameter altitude chambers, PSL No. 3 and 4.
Construction of the two new 24-foot-diameter altitude chambers, PSL No. 3 and 4. (5/6/1970)
Image Credit: NASA/MARTIN BROWN
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https://www.nasa.gov/image-detail/grc-1970-c-01312/
Image CreditNASA/MARTIN BROWN
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