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Unfortunately, CNN does very little to help us find the answer.
This is a very important subject, but CNN gives a guy playing with a touch-screen and almost no details. Kevin Bales is more than just "an expert": http://en.wikipedia.org/wiki/Kevin_Bales Dr. Bales gave a TED talk too: http://www.youtube.com/watch?v=HUM2rCIUdeI&feature=sub