Paris for 31 percent of the GDP of France. According to the Economist Intelligence Unit Worldwide Cost of Living Survey in 2018, Paris was the second-most expensive city in the world, behind Singapore and ahead of Zurich, Hong Kong, Oslo and Geneva. The city is a major rail, highway, and air-transport hub served by two international airports: Paris-Charles de Gaulle (the second busiest airport in Europe after London Heathrow Airport with 69.5 million passengers in 2017) and Paris-Orly. Opened in 1900, the city's subway system, the Paris Métro, serves 5.23 million passengers daily, and is the second busiest metro system in
Dallas/Fort Worth International Airport Governor John Connally, Transportation Secretary Claude Brinegar, U.S. Senator Lloyd Bentsen and Texas Governor Dolph Briscoe. The airport opened for commercial service as Dallas/Fort Worth Regional Airport on January 13, 1974, at a cost of $700 million. The first flight to land was American Airlines Flight 341 from New York, which had stopped in Memphis and Little Rock. The name change to Dallas/Fort Worth International did not occur until 1985. When it opened, DFW had four terminals, numbered 2W, 2E, 3E and 4E. During its first year of operations, the airport was served by American Airlines, Braniff International Airways, Continental