I think that varies with location.
If you're standing in line for security screening at FWA or LAX 20 minutes before the flight departs, you don't get on the airplane period.
bcnu,
Mikem
It would seem, therefore, that the three human impulses embodied in religion are fear, conceit, and hatred. The purpose of religion, one might say, is to give an air of respectibility to these passions. -- Bertrand Russell