government. >> a tech exec, live in dallas, left his job to work for the revolution. >> what folks in beijing have to cope with. over the past couple of weeks, not the fpicture that china wans the world to see. >> the capital city lost in a haze of grit and pollution and on really, really bad days, which there have been many, it's a problem that makes residents gasp. >> you've seen the photographs of people going down the street in beijing with face masks. that's one of the first things people have to protect themselves. you can't use surgical face masks. the tiny particle matters can go deep inside your lungs and affect your breathing and your long-term health you, can't stop that with a surgical mask. you need one of these. a thick mask. pinch your nose like this, and wander around. i have to be quite honest, it's kind of weird doing that out on