The majority of them are what's called bi-fuel. They seamlessly switch if one fuel runs out. But the dominant fuel is always natural gas. The F-250/F-350 product, our Westport WiNG product, which we're doing with Ford Motor Company, will be bi-fuel. That means they will predominantly run on natural gas. But when they need to—for example, when they run out of natural gas or want to get that extended range—they can just continue to run on gasoline. That provides the maximum amount of flexibility to the consumer.
On May 15th, 2012. See this statement in context.