least half of the nasty stuff in the air in salt lake city. then you add the factory smoke and the aerosols and the aerosot help. the officials say there if you cannot limit your driving, try to slow down the governor has not declared a health emergency but if the 0 governor does that it could lead to very, very strict cutbacks for the remainder of the winter. it's so cold in salt lake city. the shut down the airport because there was ice on the runway and a plane skidded off. >> well, we have had a bit of an incident now. this is shred you tape just in. two united airlines planes, it is believed, bumped their wings at their gates in dulles. you can see -- this is the airport in virginia, right outside of santelli, virginia.