“No Such Thing as Earthquake-Proof Bridges”

[NOTE This video, reported in October 2012, was re-posted after 6.0 Napa Quake.] Many of California’s roughly 20,000 bridges have been retrofitted to withstand temblors, but Dr. Swami Krishnan explains why it is inevitable that the state’s bridges will still sustain damage when the next Big One hits. Ted Chen reports for the NBC4 News at 6 p.m. on Oct. 18, 2012.