Renowned 'watchdog' artist Ai Weiwei's works coming to Pittsburgh

TribLIVE: Since the 1980s, Chinese contemporary art has made a huge impact on the international scene and continues to be one of the art world's major areas of focus. With countless new museums, galleries and talents coming to the fore, China has a great number of influential art-world players. But one artist in particular tops this list, and that's Ai Weiwei