Mission Specialist Christopher Cassidy
![](/images/recherche//tiles/616b58bc-c312-41db-a3cc-4e33ca7f8afd.jpg)
2009-07-20 - Mission Specialist Christopher Cassidy with astronauts Tom Marshburn and Dave Wolf before their spacewalk. (Credit: NASA)
File size: 1.26 MB
Image size: 4288 x 2929 pixels
Resolution: 300 dpi
Photo taken on July 20, 2009
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