A number of factors affect how long it takes for a mine to come online. There are numbers reported out there of around 20 years, but I would note too that a number of mines can come online in a time frame much less than that. That's precisely why, too, the major projects office was established—to help support and fast-track especially those projects that are important to our national interests. The average number reported out there is 20 years, but I do note that there is a range. Some actually do come online much faster than the 20 years noted.