Railroads and oil companies stage a show-and-tell in Sacramento to highlight safety measures they've put in place. Environmentalists and community activists remain skeptical.
In response to concerns about the risks of crude by rail, Union Pacific has begun to boost its rail inspection program by dispatching vehicles with lasers that can find tiny track imperfections.
Trains loaded with volatile Bakken crude pass through or near cities and sensitive environmental areas on a regular basis.
Beginning Saturday, railroads must notify states when large shipments of crude oil come through by train. The new rule is in response to safety concerns with crude-by-rail.