Cracks were appearing in houses in Ha Noi's Old Quarter leading to subsidence following the demolition of a guest house located on ...http://vietnamnews.feedsportal.com/c/35237/f/655031/s/3aa57049/sc/22/l/0Lvietnamnews0Bvn0Csociety0C2551370Ccracks0Eappear0Eon0Eold0Equarter0Ehouses0Bhtml/story01.htm