T-shirts featuring Mao Zedong, left, and Beijing Olympics, right, are sold in a street Tuesday, Aug. 14, 2007 in Shanghai, China. China celebrated the one-year countdown to the start of the Beijing Games last week, however  the Olympics chief warned that the capital's dirty air could force the rescheduling of some events. AP Photo logo AP Photo 23 months ago

T-shirts featuring Mao Zedong, left, and Beijing Olympics, right, are sold in a street Tuesday, Aug. 14, 2007 in Shanghai, China. China celebrated the one-year countdown to the start of the Beijing Games last week, however the Olympics chief warned that the capital's dirty air could force the rescheduling of some events.