al environment in the global airline industry? What factors led to the success of major metro areas to maintain their secondary and reliever airports?...

What is the general environment in the global airline industry?
What factors led to the success of major metro areas to maintain their secondary and reliever airports?
Given these projections in traffic growth and the existing air traffic delays at many of the most important hubs in the United States, do reliever airports provide an opportunity to ameliorate congestion and expand/enhance commercial operations in the United States?
Discuss how population growth in the Phoenix area had a positive effect on reliever airports?
The review of reliever airports and this case study of Phoenix has suggested many of the positive aspects of having a strong regional airport system. What are some of the negative aspects?