. -- cummins does best.on is one of the technologies we have been working on for many years, but we are now seeing an urban market, a potential that battery driven powertrains and hybrid powertrains will be economically viable for bus companies and companies,portation relatively shortly. we want to be at the forefront of that innovation. we see it as an opportunity for our company to grow and to give customers more value. david: talk about how you're going to manage that transition, you know sooner or later you will get there, you don't want to run away from your core business of easel too quickly? -- diesel too quickly? it's a company that wants reliable today, and an innovator tomorrow, we have hips that go back many years. we know what we need to do, we -- we provideeed service and support on a global basis to our customers. that is an important thing. that means you have to deliver on your core business every day, but you need to be ready for the future, too. you have to innovate, be open to new ideas fr