Today there are over 1,500 public-use airports in the United States. Each of these airports provides a service to the surrounding community, whether in the form of a general aviation or commercial air service facility. An airport is dependent on many facets of the local government infrastructure for support services. Also, the airports have ties to neighboring or resident military installations. A military installation has similar missions and objectives to an airport, a situation that enables a working relationship that is complementary to each party. For example, airports and military installations alike must provide such services as emergency response, fire protection, airspace control, environmental protection, and a safe infrastructure for aircraft operations. While many aspects of the relationships are intangible and subjective, others are easily measured. (Contains 8 figures.)