Del Gordon lived in Northern Virginia with lots of rain to grow just about anything that could tolerate the winter. Then he moved to arid Sierra Vista in Southern Arizona.

Do pesticides cause asthma in children? Is there an environmental link to childhood obesity? A massive national study could provide answers.

"When you're a mayor you can't claim anything as your own. It's really teamwork." Diane Joens, Mayor of Cottonwood, said.