French climber Alain Robert, also known as "Spiderman", scales the 231 metre First Tower at the La Defense business district outside Paris May 10, 2012. Robert has scaled 85 giant structures around the globe including many of the world's tallest structures, most of which he has scaled using only his bare hands and climbing shoes. [Photo/Agencies]

French climber Alain Robert, also known as "Spiderman", scales the 231 metre First Tower at the La Defense business district outside Paris May 10, 2012. [Photo/Agencies]