The document lists the photographers credited for various photos, including Kevin Walsh, U.S.A. Department Of Labor, Eva Rinaldi, jayneandd, John Martinez Pavliga, i k o, Paul Bica, Jason Howie, hdptcar, Simon Berry, Eric Lafforgue, Davide Comelli, Geraint Rowland, Hilary Wilkinson, Jake Bouma, tribehut, Greg Westfall, Steve Jurvetson, and Marji Lang.