Kari visits one of the United States' top tech capitals.

Kari dives into the ongoing urban experiment known as Berlin.

Kari learns about efforts to feed the growing world.

Kari visits Israel and discovers many ways to achieve peaceful coexistence.

Kari ventures to Doha, Qatar, to discover how people survive in the desert.

Kari visits New York, where people work to make the city more livable.