Canadian Space Agency astronaut Bob Thirsk
![](/images/recherche//tiles/736a22e4-2570-4bcc-a483-db1acdb5edac.jpg)
Canadian Space Agency astronaut Bob Thirsk poses for a portrait following an Expedition 20/21 preflight press conference at NASA's Johnson Space Center. (Credit: NASA)
File size: 0.37 MB
Image size: 1701 x 2551 pixels
Resolution: 300 dpi
Photo taken on March 4, 2009
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