EXAMINING THE FOUNDATION It was back in 1962, I'm told, when cracks began to appear in the 42nd story of a very expensive high-rise in Hong Kong. It had already withstood numerous typhoons. And there was no ready explanation for the cracks' sudden appearance. Yet there they were. Obviously, there had to be a problem somewhere. So a team of architects and structural engineers was called in to ferret out the cause. Finally, one determined engineer stumbled upon the reason as he was prowling around the foundations deep in the basement. When he tapped the plaster, he noticed that...