21.   Ever since, contention has been a frequent traveler.

22.   Even as the Transportation Administration moves forward with trusted traveler, it has eliminated other convenience-oriented security features such as checkpoints designated for frequent travelers.

23.   For now, however, frequent travelers will get the most benefit.

24.   For frequent travelers, the process is as routine as morning coffee, rush-hour traffic and dirty clothes.

25.   Frequent travelers on zany airlines also say flight crews have to be increasingly creative to offer something new to travelers who have heard the same routines before.

26.   Frequent travelers, however, create a commercial imperative.

27.   Frequent travelers and entertainers are most at risk.

28.   Frequent travelers who forget to check for hidden charges in car-rental agreements can find annoying surprises at the return counter.

29.   Frequent travelers crossing into Canada from Montana can zip through an automated voice-verification system run by the U.S. Immigration and Naturalization Service.

30.   Frequent travelers find on-line banking especially useful.