T: barrier1. competition in the airline industry.Competition in the industry, a large number of aviation, which influence the airlines made airport, cost a lot more to build the passenger terminal and expansion of the airline's more-travel.2. the various crisisAviation industry, with sensitivity towards the environment very seriously. External factors, whether it is economic, political. War Epidemics they affect confidence in traveling tourists such as financial crisis. Affect people's income and expenses. Aviation industry is directly affected by the crisis, such. Requirement to travel both domestically and abroad, as well as business travel is reduced by implication based on the economic conditions. The crisis sabotage in the airport bomb in 1974, 1986, 1994, 2006 aviation accidents occurring there who died in 1948, 1956, 1965, 1968, 1972.
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