But more ambitiously, Amtrak recently hired consulting firm KPMG to develop a plan for high-speed rail service from Washington, DC to Boston by 2020.

BBC: The futurist: Putting the choo-choo back in Chattanooga

Furiously paddling back to dry land I look behind me, only to see the rest of the crew still on the water, ambitiously trying to get a few more shots!

BBC: Behind the scenes