One Thing Leads to Another and Before You Know It...

My plans for the day have been totally shot to hell. I was originally planning to work on campaign stuff today, but got sidetracked by the story about California approving the start of their High Speed Rail Project. That led to some Google research on the California High Speed Rail Authority, which led to some fairly detailed specs on a similar project in Brazil, which led back to further research on high speed rail technology in general, which led to yet further research on tunneling technology. Net result: No progress on the campaign today, but I would like to direct your attention to this fascinating video on how tunnels are constructed. All in all a pretty interesting if unproductive day!