In some cases, it's client-driven. If a particular department has a particular interest in a technology, they will express that interest. Then the private sector will return with the feasibility of how it could be included and what the economics would be. The department would have the final say. In some cases, the extremely good economics of other measures will help more leading-edge measures make more sense, so you can bundle these together in an overall investment.
On October 2nd, 2012. See this statement in context.