Interesting article by Bill Sweetman:
http://www.popsci.com/popsci/aviationspace/95e16f096bd8d010vgnvcm1000004eecbccdrcrd.html
http://www.popsci.com/popsci/aviationspace/95e16f096bd8d010vgnvcm1000004eecbccdrcrd.html
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