The people designing the weapons literally often didn't know how they were being handled in the field by the Air Force - and a lot of people in the Air Force didn't understand some of the dangers. There's a very strong element of madness in this.

We're all connected by the system, and we all have to be a part, I think, of changing it.

Kids have no idea when they're drinking soda what they're really drinking, and a lot of them are stunned when they learn that drinking a Big Gulp is like taking a big jar of sugar and just pouring it down. There are 50 teaspoons of sugar in a 64-ounce Big Gulp.

The federal government has more power to recall a defective stuffed animal who's little glass eye may fall off than to recall contaminated ground beef that could sicken or even kill hundreds if not thousands of people. The meat-packing industry is so powerful that it's managed to prevent the government from having this basic power of recalling a defective product.

What we eat has changed more in the last 40 years than in the previous 40,000. The survival of the current food system depends upon widespread ignorance of how it really operates.

I've written about illegal immigrants in the United States; I spent a year following migrant farm workers as they were harvesting. I've written about our criminal justice system, and how it treats the victims of crime. I've been working for years now on a book about prisons in America, and I've been going into prisons and traveling around the country and seeing what's going on.

I'd been eating fast food all my life without thinking about it. And the more I learned about the subject, the more intrigued I became.