left. former reed senator lincoln chaffey. we'll join him when we come back. moved some new cars. hauled a bunch of steel. kept the supermarket shelves stocked. made sure everyone got their latest gadgets. what's up for the next shift? ah, nothing much. just keeping the lights on. (laugh) nice. doing the big things that move an economy. see you tomorrow, mac. see you tomorrow, sam. just another day at norfolk southern. denver international is one of the busiest airports in the country. we operate just like a city and that takes a lot of energy. we use natural gas throughout the airport - for heating the entire terminal generating electricity on-site and fueling hundreds of vehicles. we're very focused on reducing our environmental impact. and natural gas is a big part of that commitment.