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If you fly even occasionally, you may have noticed that the whole process of what you need to do to get on an airplane is different - and keeps changing. And changing. And changing. (At least the makers of Ziploc bags are getting a good deal out of the current set of rules. It's now called "3-1-1," because everything is better when there's a happy, innocuous-sounding mnemonic for it, right?)

So, have you noticed the change in process for checking passengers' identification? Read more on the other side.