Zack Branham is a 24 year-old American who was in Japan teaching English when the quake struck.

Branham made it through the quake but had no idea if his girlfriend, who was at a coastal town four miles away, also survived. Determined to locate her, Branham traveled by foot for 20 hours through impassable roads until he finally found his girlfriend.

Branham talks to Kiran Chetry and Christine Romans about his experience.