In every hurricane I studied, some portion of the population refused to evacuate. People, for whatever reason, often stay and ride it out.

I just shook my head when I saw a Texas official on TV saying he can't make people leave cities in Rita's pathway. Of course they can. They can go door to door and take people out.

We find the best kind of evacuations are the ones where officials go door to door, give residents the information face to face and get it to really hit home.

The continuing sinusitis is the reason for the persistent cough in my patient population. You can get a pattern of coughing that is similar to bronchitis that is a result of the low-grade sinusitis.

Today the reason why the human population is increasing is because of the attitude of the people.

The biggest reason for optimism about investment in all commodities is population growth. Half of the world's 6 billion people live in economies growing at 6 percent a year, but there have been no major gold, oil or copper discoveries.