11.   At midday Sunday she checked her bags at an American Airlines gate, then watched the thunderstorms roll in.

12.   Bag matching assures that no one can check a bag without boarding a flight.

13.   Bags were being checked at most theaters.

14.   A security guard needed to check his bags.

15.   After checking two bags, we still had too much to carry on easily.

16.   Airports were designed for a passenger to park, check bags and get to the gate with as little walking as possible.

17.   Airline officials say they jam overhead bins, slow boarding and deplaning and fray tempers as gate agents increasingly demand that bags be checked.

18.   All nine said three bags can be checked without extra charge.

19.   Business travelers on tight schedules routinely try to avoid checking their bags so they can save time when they land.

20.   But United has not given up on trying to persuade more passengers to check their bags.