Fireworks illuminate the sky above the new National Stadium in Warsaw, during the official opening ceremony, on January 29, 2012. Poland cleared a crucial hurdle in its closely-watched preparations for Euro 2012, as thousands braved bone-chilling temperatures at the rock'n'roll inauguration of its new national stadium. Poland and Ukraine are the hosts of the upcoming Euro 2012 football championship. AFP PHOTO / WOJTEK RADWANSKI