This happened recently.
A measurer took a transcontinental flight of over 2000 miles, and changed planes at an enroute city (city A) to reach his final destination (city B).
At city A the airline security folks confiscated his two Jones counters, which he had in his carry-on bag, saying they had "sharp edges."
This posed a very tough problem for the measurer. When he is less busy I'll try to persuade him to tell the full story.
Original Post