This file is licensed under Creative CommonsAttribution ShareAlike 2.0 License (cc-by-sa-2.0). In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it under this or a similar cc-by-sa license.
This image, which was originally posted to Flickr, was reviewed on 7 August 2007 by the administrator or trusted userKameraad Pjotr, who confirmed that it was available on Flickr under the above license on that date. The license originally specified when this file was uploaded was CC-BY. It is unknown whether this license was ever valid.