<iframe width="580" height="385" src="https://www.youtube.com/embed/QxETrMV72WM" frameborder="0" allowfullscreen></iframe> <br>In the late 1970s, a Detroit-area aeronautical engineer who helped make NASA'S Apollo program possible dreamed up an ... <br><a href="https://www.youtube.com/watch?v=QxETrMV72WM">source</a>