1.   At the airport, confusion and inconvenience greeted all passengers arriving at Terminals A, B, and C, the main hubs for flights.

2.   Dominant airlines are able to shut out new entrants at their main hub airports by using their influence to stop expansion and by signing long, exclusive gate leases.

3.   Therefore I choose to fly from regional airports rather than from main hubs and opt for stopovers rather than non-stop flights.

4.   To win back customers, Continental added perks for frequent fliers and began refurbishing its main hubs in Houston, Cleveland and Newark, New Jersey.

5.   UPS is steadily expanding its flights from two main hubs in Hong Kong and Singapore.

6.   US Airways, currently the fifth-largest U.S. airline based on revenue, has its main hub in Charlotte, North Carolina.

7.   US Airways, the fifth-largest U.S. airline in revenue, has its main hub in Charlotte.

8.   It said the Yangtze on Sunday was at its highest level yet upstream at Chongqing, a main industrial hub in southwestern China.

9.   The environmental activists revealed dangerous contamination at an illegal stockpile of toxic waste at Homebush Bay, near the main hub of the games.

10.   U.S. forces moved into the base in October, and during the winter it was a main hub for the U.S.-led campaign in neighboring Afghanistan.