A consideration when boking travel for the ccw'er

What???

So, my question is this about arriving in NY. The example given of the fella who got arrested after his flight got delayed and diverted to NY, if the suitcase or case holding the weapon is not supposed to marked as having a weapon, how do the authorities know you have a weapon? Do they consult the computer or data from the computer and simply wait at the luggage carousel and then arrest you? That seems wrong to me. Mighty, mighty strange. It seems they should give you the opportunity to leave your luggage in safe-keeping to avoid arrest. So, the choice is get arrested or leave your luggage? What a jacked up system!
Anybody know how the authorities knew they possessed a firearm? I have flown many times and the luggage claim area seems deserted of all but travelers.

Thanks

dcmdon,
Thanks. Explains why an earlier poster said he got a rental car when he got into the Chicago airport. I suppose if the fella we are talking about had just rented a car and flown out of a gun friendly state/airport, then no problems. Or he could have mailed the gun home, or whatever an safe alternative would have been.