Organizers of Shanghai's World Expo have been holding trial runs this week, before the official opening this Saturday, May 1st. About 70 percent of the nearly 200 participants participated in the trials, and visitors were already encountering long lines. Officials now estimate the 6-month event, themed "Better City, Better Life", will attract up to 100 million visitors, 95 percent of them Chinese.
![Shanghai's Expo nearly ready](https://cdn-ak-scissors.b.st-hatena.com/image/square/d4c47437f69cdefca685e21618c5d1aec6aa4250/height=288;version=1;width=512/http%3A%2F%2Finapcache.boston.com%2Funiversal%2Fsite_graphics%2Fblogs%2Fbigpicture%2Farchive%2F144518.jpg)