Heathrow is the world's busiest international airport. Heathrow is also the world's second busiest cargo port. Regarded as the hub of the aviation world, over 90 airlines have made Heathrow their base. http://www.baa.co.uk/main/airports/heathrow/
As the aviation authority for the nation's second largest city, and hub of one of the world's most populous metropolitan areas, Los Angeles World Airports is faced with the challenges of providing an airport system to serve a major portion of the Southern California market. http://www.lawa.org/
An innovative co-operation between the public sector and private initiative, the "Athens International Airport S.A" is a privately managed company, responsible for the construction and operation of the airport "Eleftherios Venizelos" for a total period of 30 years. http://www.aia.gr/