at the time we spoke to steve heneger, head of the toll authority.ld us that the structure was so solid that if there was an earthquake he would want to be on the bridge. i asked him if he felt the same way. >> of course i do. that bridge is built like a brick house. it will do just fine. >> reporter: in the end it wasn't steel from china that caused problem. steel bolts from ohio broke during testing. after three independent investigations and ongoing repairs, experts gave the go ahead for the bridge's opening. but wary san franciscoens still worry. >> about the broken posts and stuff like that, i'm not so sure. >> you just never know these days. people rush through to get these dong. >> reporter: the transportation officials say the signs are solid, the repairs more than sufficient. >> i think they should be reassured. there have been a lot of news stories about the new span, but non-of them have produced any credible evidence that it's less safe than the old bridge. in fact, it's orders in magnitude safer. it's built to modern seismic standards. >