Small Italian town may hold lessons in exceptional longevity

Every year, people flock to the small town of Seulo on the Italian island of Sardinia, searching for the secrets to a "longer life." Seulo’s region is one of five "Blue Zones" around the world where locals have been found to have exceptional longevity. The others are in Costa Rica, Greece, Japan, and California in the US. Giles Gibson went to Sardinia to see if he could crack the code.