Canadian astronaut Bob Thirsk training for Expedition 20/21
![](/images/recherche//tiles/d5cf3496-9d93-4f13-ab1a-e01cbc6d41c3.jpg)
Canadian astronaut Bob Thirsk training for Expedition 20/21. (Credit: )
File size: 0.71 MB
Image size: 1800 x 1350 pixels
Resolution: 96 dpi
Photo taken on April 21, 2008
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