The document contains links to 13 photos on Flickr with attribution to the photographers. The photos are from various photographers and contain no other text.

1. Photo by Paul Brown - http://www.flickr.com/photos/paulyb1971/4689209222/

2. Photo by Distressed Volatility - http://www.flickr.com/photos/dvolatility/6190920051/

3. Photo by OZinOH - http://www.flickr.com/photos/75905404@N00/2841648846/

7. Photo by Canadian Pacific - http://www.flickr.com/photos/18378305@N00/7623734402/

8. Photo by epSos .de - http://www.flickr.com/photos/epsos/4376727123/

11. Photo by woodleywonderworks - http://www.flickr.com/photos/wwworks/2959834115/

13. Photo by Quazie - http://www.flickr.com/photos/quazie/578252290/

15. Photo by Adam - http://www.flickr.com/photos/slackeronline/487225570/

16. Photo by nuklr.dave - http://www.flickr.com/photos/david_mackay/1396733239/

17. Photo by trader_john - http://www.flickr.com/photos/33120201@N06/3086570592/

20. Photo by Trevor Blake - http://www.flickr.com/photos/trevorblake/3200899889/

22. Photo by Craig Sunter - http://www.flickr.com/photos/16210667@N02/8655280621/

24. Photo by Paul Brown - http://www.flickr.com/photos/paulyb1971/4689209222/