1.   Jet-age airliners are also less robust in the field.

2.   An airliner is an airliner anywhere in the world but a train is part of the landscape.

3.   And by that time, a fast-moving airliner could be miles away from the call spot.

4.   Because airliners are expensive to design and build, most companies usually insist on a minimum number of planes ordered before committing themselves to build a new model.

5.   Airliners are outsized flying billboards, and their paint schemes are among the most identifiable of corporate symbols, noted Robert Coggin, executive vice president-marketing.

6.   Airliners will be hijacker-proofed and private pilots deeply vetted.

7.   Airliners are packed, intercity rockets.

8.   All U.S. airliners must be equipped with detectors by March.

9.   Civilian controllers say they explained that two airliners were in the area.

10.   Commercial airliners are equipped with audible cockpit warning alarms that will sound when the loss of cabin pressure exceeds pre-established limits, said FAA spokeswoman Kathleen Bergen.