Things are getting "strange" when such a knife gets attention. I am glad I am no longer assigned to NYC.

I carried my Buck 110 everywhere then (1979-1981) as now. It was my blue jeans that attracted attention then.

It has always been my understanding that a 3" knife was good to go, anyhere in the USA. I think I will stay away from the large cities from this point forward.
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QMC, USCG (Ret)
The best luck is what you make yourself!