Visitors walk through the art installation ‘Sunflower Seeds’ by Chinese artist Ai Weiwei in London, Monday, Oct. 11, 2010. The specially commissioned art piece takes the form of a field of sunflower seeds inside the Turbine Hall at Tate Modern gallery, made of over 100 million handmade unique porcelain replicas of sunflower seeds, made by Chinese Artist Ai Weiwei, and will run until May 2, 2011. (AP Photo/Lennart Preiss)