T.S.A. Sees No Terror Link in Arrest at Kennedy Airport - NYTimes.com
I am not sure what they stopped him for. Stun batons and stun guns are not illegal in the US, in most places, and if they are illegal in the country of arrival it is their problem. The pepper spray may be illegal, but not a federal law, it would have been a state law. Lastly, the Supreme Court was very specific on what was discoverable in this limited search at screening check points, even cash was not considered discoverable. It was only items that could hurt the traveling public. In no way was what was found in the checked bag, a potential harm to the traveling public, it was in the hold, not available to the passengers.