In 2021, when Aurora comes online, expect it to be the top machine domestically. "It's targeted to be the fastest in the United States when it's built," says Alan Gara, a fellow at Intel, which is also working on the new machine. Or course, the US is not the only country investing in supercomputers. Right now, the third-fastest machine is in China, and as recently as November of 2017, the two fastest supercomputers were both Chinese, followed by Switzerland and Japan. "There's a little bit of a race, and for good reason—these have become for tools for nations to compete in some ways," Gara says. In brief, if Aurora is fastest in the world at some point, it's safe to assume it won't hold that spot perpetually.