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
2017 Orly Airport attack 2017 Orly Airport attack The March 2017 Île-de-France attacks were a pair of terrorist attacks by the same individual in Garges-lès-Gonesse, an outer suburb of Paris, and at Orly International Airport near Paris on 18 March 2017. The attacker, a 39-year-old man identified as Ziyed Ben Belgacem, was shot dead after attempting to seize a weapon from a soldier patrolling the airport under Opération Sentinelle. At Orly Airport, the attacker shouted that he wanted to kill and die in the name of Allah. the attack is officially regarded as an act of terrorism. The first attack took place at 06:55