Apple announced its new MacBook Air today at a special "Back to Mac" event in Cupertino. Air will now be offered in two screen sizes, with a 13.3-inch screen, which is the same size as the previous generation, and a new yet smaller version that will include a 11.6-inch screen. The two systems will include the 6:55 hours of battery life, flash storage and full size keyboards and track pads.
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