Sandra Greene and Cynthia Sprader at Test StandPropulsion engineer Sandra Greene, left, and test engineer Cynthia Sprader recently completed a series of test firings at the Marshall Center.Read More Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/sandra-greene-cynthia-sprader-test-stand-2/Copy URL to clipboard> DownloadShareTagsWomen's History MonthSize1041x746px