Who lives longest? CIA's top 20 nations for life expectancy

What's the secret to a long life? Maybe where you live. Countries that offer the highest quality of life tend to have the longest-living citizens, says the Central Intelligence Agency, which has tracked the average life expectancy at birth for every country in the world.

Where do people live the longest? Keep clicking to see the CIA countdown - you might be surprised at where the U.S. ranks...

Credit: Flickr/Pedro Simoes