Fireworks explode over the Tian'anmen Square during a rehearsal for the opening ceremony of the 2008 Beijing Olympic Games at the Olympic Green in Beijing, August 2, 2008. The firework display for the opening ceremony on the night of August 8th will run as long as 20 minutes, seting off from 29 other locations including Yongdingmen, and the section of the Great Wall at Juyongguan Pass.