Did you know, for example, that planes can't fly over Paris? It seems surprising that the capital of France, despite having four airports within its city limits, has prohibited airspace but it's true! Moscow is another big city over which all flights were prohibited from the 1960s. However, in 2013, a new law was issued that finally allowed commercial airplanes to cross the sky over the Russian capital. Let's find out what the reasons are!

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