NIGHTS in Gaoqiao, as in other Chinese villages, are usually still, interrupted by the sound of crickets and the cold wind. But not that one particular night. An ear-splitting explosion tore the skies of Gaoqiao. Thousands of local people were shocked out of their snug beds. Some tried to find out what happened. Even before their eyes were fully opened, waves of hot air and stench permeated the villagers homes.

Some rushed out of their homes. Howe