Surviving North Korea: Laura Ling's 140 Days in Captivity
Lisa says she even teased the president for looking so serious once her sister was home safe. "I said, 'Nice face when you arrived in North Korea.' Because usually he's jovial and happy-go-lucky," she says. "He said, 'I had to practice that.' He didn't want the world to see that he was there for fun in any way."