The federal government had long struggled to find a location for the radioactive waste produced by nuclear power plants. Since 1987, the government had narrowed the list of possible storage sites to one: Yucca Mountain, a location 90 miles outside Las Vegas, Nevada. The Bush administration-strong supporters of nuclear power-decided that enough analysis had been done, and that it was time to formally establish the site as the nation's primary repository for nuclear waste. Progressives opposed this decision because they opposed nuclear power as unsafe, and because they worried that transporting the waste across the country risked catastrophic accident or attack. They voted "no" on the resolution to establish the waste site, but they were outvoted and the resolution passed by a wide margin, 306-117.