(Pacific Southwest, which merged with USAir stopped appearing on the list in May, making the number 13.)

USAir, a forerunner of US Airways, bought Pacific Southwest in 1987.

The Pacific Southwest is a region of the United States.

Cultures combine and collaborate in the Pacific Southwest.

Cowboys can be found anywhere in the Pacific Southwest.

Laver also won the last big open event of the year, the Pacific Southwest in Los Angeles on hard courts.

The catalytic tournament was Jack Kramer's Pacific Southwest, which offered $12,500 to the men's winner, $1,500 to the women's.

The museum collects, preserves and shares the history of railroading in the Pacific Southwest.

It is entirely possible to live life like Ken Rosewall played his final match against Rod Laver in the 1968 Pacific Southwest.

Region 9's field staff also work on several field projects to assess environmental quality in the Pacific Southwest.