In the Name of The Father, The Son, and the what is that???
Some people feel scared during flight and need the comfort of prayer to the Divine. Yet, taking out a cross with a hidden knife in it will probably make other passengers uncomfortable being around that believer.
Knives and other sharp objects should be packed in checked luggage only. We pray that the passenger had a safe flight and wasn’t fined for bringing prohibited objects in carry-ons. Amen!