A newly launched archive of Lehigh Valley Industry and Culture. I found the immigrant (Syrian, Russian, Moravian, Polish, Austrian) section particularly engaging with lots of interviews. Link…
Jean Bertin, a French engineer, designed and built the Aerotrain in the 1960s. You can see it in action here. There was also a 'Surburbain S44', here's what's left of it. Rohr Industries, licensed the technology and built an Aerotrain in America.