La NFL en fotos

Head injuries can cut short careers and cause permanent, irreversible brain damage. Preventing them is a primary goal for many doctors, researchers, and NFL executives. Some school kids in Massachusetts are also trying to tackle the problem. Ken Macleod reports.

Head injuries can cut short careers and cause permanent, irreversible brain damage. Preventing them is a primary goal for many doctors, researchers, and NFL executives. Some school kids in Massachusetts are also trying to tackle the problem. Ken Macleod reports.