I really can't stand having to take my shoes off before getting on an airplane these days. I purposely wear crocs or sandals so that it's relatively quick and easy to get through the security check.
And let's be painfully honest, there are some people who should be allowed to keep their shoes on, no matter what.
The T-ray sounds like a great solution. In fact, it's almost too good to be true. I wonder if some mutant T-ray property will be discovered years down the road, and frequent fliers will end up paying dearly?
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