On Friday, the state of Nevada filed more than 200 legal objections with the Nuclear Regulatory Commission over the Yucca Mountain project. Nevada is contesting the Department of Energy's suggested safeguards for the proposed nuclear waste repository. The DOE wants high-tech metal containers for the waste, along with multibillion-dollar titanium shields to protect the containers from drips and corrosive water, and even robots to install the shields 100 years from now. Opponents of the project say that technology does not yet exist, and call the ideas "science fiction."