A Russian performance artist was hospitalised Sunday after stripping naked and nailing his testicles to a Red Square cobblestone in protest against the Kremlin's crackdown on political rights. A video of the graphic action, available on Russian websites, showed artist Pyotr Pavlensky sitting naked outside Lenin's Mausoleum being covered with a blanket by police officers while horrified passersby looked on. The state-run RIA Novosti news agency said Pavlensky was taken to a police station after...