‘If that’s not a knife then what is it?’: Chicago woman gets stopped by drug-sniffing dogs at O’Hare. Then a TSA agent pulls her out of line

Most travelers feel like they have a decent grasp on TSA rules. Liquids go in a quart-size bag, laptops come out, the usual. Still, there’s a wide gray area when it comes to everyday items that don’t seem dangerous, until they show up on an X-ray looking like something else. That’s exactly what happened to one Chicago woman, whose carry-on set off ...