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An Iran Air Boeing 747 passenger plane on the tarmac of Mehrabad Airport in Tehran in 2013. Iran bought most of its planes from Boeing before the 1979 Islamic Revolution. The country now has one of the oldest airline fleets in the world. With sanctions lifted, Boeing can once again sell planes to Iran, but the country recently announced a major deal with Airbus. BEHROUZ MEHRI/AFP/Getty Images hide caption

toggle caption BEHROUZ MEHRI/AFP/Getty Images