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 8-February-2008 by the administrator or trusted userFernando Estel, who found that it was currently available on Flickr under the license copyright (all rights reserved), which isn't compatible with the Commons. It is unknown whether the license above was ever valid.