The workers in Las Vegas working on a project at the MGM Grand's City Walk walked off the unsafe job site and won safety concessions. I think this is one of the best uses of strikes to get your point across that I have seen. The project six workers have died on the site in the last 18 months. The demands that they won include the following items:
Conducting and paying for on-site safety training for all workers administered by the center.
Full job site access to union and safety officials.
I hope that these changes make the site safer. The blog post about the strike result is here.
An earlier post gives more background information on this story.