More bad news for San Francisco’s tilting tower An underground wall could prove to be a serious obstacle to reversing the tilt of the Millennium Tower, a major goal of the US$100 million fix for the troubled 58-story San Francisco high rise. Over the past six months, repair work has caused the building to tilt an additional 2.75 inches, with veteran Geotechnical Engineer Rob Pyke saying, “there is no question…