you. thank you and god bless you. god bless america. that was the president speaking in upper marlboro, maryland, at a distribution center for a grocery store chain, safeway, a company that has worked in improving the efficiency of their own truck fleet. if you have traveled across america, there are a few trucks out there, speaking to americans about the need for our own fuel efficiency in our own home and using that as a back drop to do more with the big trucks he says accounts for about 4% of the trucks or vehicles out there. a big chunk of the greenhouse gas emission. about 20% of those emissions. the specific thing he did today doesn t sound that earth shattering. he called on the epa and the transportation department to come up with some new standards within the next year for these heavy trucks. so, that, in and of itself, doesn t sound like a big deal. i want to bring in wolf blitzer, athena jones and ronifa ruhart.