and, michael brune, executive director of the sierra club, an environmental group. michael brune, i want to start with you and ask you overall what you see as the significance of the president's visit to dark tick. >> well, it's very significant. the president made climate change a top priority of his administration in both terms and going to the arctic is a great place to showcase the threats that climate change has both on the economy as well as the environment because there is no place that is warming faster than the arctic any where else around the world. >> ifill: robert bryce, what's your take on that? >> well, i can't argue temperature issues. i think what's interesting, though, is that the president has given the green light to drill in alaskan waters, and i think it's a pragmatic move. while he is talking about climate change, there is a conflict between some of this climate change discussions and what he said saturday in his radio address, he says our economy still has to rely on oil and gas, as long as that's the case i believe we should rely on domestic