Van Cliburn didn't play, Bruce Hornsby wasn't introduced, and the guest of honor's English interpreter could barely be heard by much of the outdoor audience. Other than that, the 2008 Liberty Medal ceremony honoring former Soviet leader Mikhail Sergeyevich Gorbachev went off without a hitch tonight at the National Constitution Center. Against the backdrop of clouding relations between the United States and Russia, former President George H.W. Bush, chairman of the center, presented the 20th annual award to Gorbachev for his role in ending the Cold War and bringing democracy to the formerly communist Soviet Union. "Regardless of the dividing...