Amazon is today celebrating the FAAs relaxed stance on in-flight electronics the best way it knows how: the online retailer is holding a sale. For one day only, Amazon is cutting 15 percent from the cost of its 7-inch Kindle Fire HDX, Kindle Fire HD, and the entry-level $69 Kindle. You can redeem Amazons offer by entering promotional code ThnksFAA during the checkout process. The discount brings the 7-inch HDX down to $195, with the Kindle Fire HD falling to $118.