To date, this is one of the challenges we see for alternative fuels. If you look back at 20 years of government spending, for energy use and transportation it's more than 95% crude oil. We may read a lot about electric vehicles, fuel cells, and other options, but at the end of the day, it's tremendously tough to get these things into the market.
With natural gas, I think this particular option happens to be at the intersection of a few things. One is the supply change I mentioned.
The other thing that's coming that will favour this and makes the investment right now the right window for the private sector are tighter marine regulations in 2015 and 2016. Again, there will be three compliance options there. That will be an issue for both the Great Lakes and the east and west coasts. Natural gas can already meet the requirements plus provide a GHG benefit. That's the other thing that industry is looking at to say, look, it's not just one part of the market now that the pieces are starting to fit together more effectively, but it's a very tough task.