With the amount of construction work being done at breakneck pace before the Expo, it’s maybe not surprising that worker accidents happen. But yesterday was especially tragic, with three dead and three injured at two separate work sites in Shanghai. In Xuhui District, a shaft platform on an office building site collapsed, sending five people into wet concrete below. Three are in stable condition, but two were pronounced dead soon after. Hours later, a crane truck fell into a 10-meter deep foundation ditch in Hongkou District. The driver died. Local safety bureaus are investigating the accidents.