The flame will visit 22 cities and five continents before it arrives in Beijing, but it is already shining a light on some big obstacles ahead.
For more on Beijing and the Olympics, click on my Notebook.
John Metzler was fighting in the Vietnam War when he got a letter from a girl he didn't know, thanking him for his service
Timmy Ditka decided to leave the sport after a serious injury sidelined him at a young age
Watch CBS News anytime, anywhere with the our 24/7 digital news network. Stream CBSN live or on demand for FREE on your TV, computer, tablet, or smartphone.
Watch Now
Video: 
