Three doctors' harrowing journey through Gaza

Since the current war in Gaza began nearly three years ago, a small number of US medical professionals have been rotating in and out of posts in the Strip's few functioning hospitals. In the new documentary "American Doctor," director Poh Si Teng follows three of those American physicians, including one who is Jewish and another who is Muslim. The World's Carolyn Beeler speaks with Teng and Dr. Thaer Ahmad.