The Gotthard Base Tunnel officially opened in the Swiss Alps today; it's 57km length and ultimate 2300m depth mark it as the longest and deepest tunnel in the world. And, at 17 years in the making, it was also dubbed Switzerland's "project of the century". It will eventually enable high-speeed rail traffic between Zurich and Milan.
So why would Georges-August Leschot, father of the V&C Leschot Calibre, be proud of this awesome achievement more than 130 years after his death? Because in 1862 he and his son Rodolphe patented the diamond-core drill which permitted the construction of railway tunnels throughout the world. This obituary appeared in 1884 Scientific American: