Judy Woodruff:

Lack of access to running water is an issue in many developing countries, but it turns out it's also a problem in the United States.

The sprawling Navajo Nation reservation is the size of West Virginia and it spreads across 13 counties in New Mexico, Arizona and Utah.

Special correspondent Fred de Sam Lazaro traveled to Thoreau, New Mexico, and has this report on new efforts to get on the grid to get the water.

It's part of his ongoing series Agents for Change and this week's Leading Edge segment.