During the Cold War, one of the greatest battles was the space race. This contest was fought through science and engineering. In the middle of it all, the U.S. military created a rocket-powered plane that was able to reach the edge of space. So how did they do it, and what did it take to make this thing go so fast?
Stop robocalls for good with Kim’s eBook
Robocalls interrupt us constantly and scam Americans out of millions of dollars every year. Learn Kim's best tricks for stopping annoying robocalls in this handy guide.