Canadian astronaut Bob Thirsk
![](/images/recherche//tiles/2fb578d2-84be-4ffc-9b4e-1b7707d62544.jpg)
Canadian astronaut Bob Thirsk during a medical training session in preparation for Expedition 20/21.
(Credit: NASA)
File size: 0.07 MB
Image size: 424 x 639 pixels
Resolution: 96 dpi
Photo taken on May 17, 2009
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