This video shows how structural engineers in the San Francisco Bay Area have retrofitted existing structures and designed new structures to withstand ground shaking during earthquakes. Examples of new buildings designed with modern materials are presented. Several examples of building and highway retrofitting are also presented. The example of base isolation of San Francisco City Hall is a major feature of this video segment. This video was developed by the the US Geological Survey to commemorate the 100th anniversary of the 1906 San Francisco earthquake.