title: The Air Iron Curtain of the 21st Century: the Ukraine of the Air | A Cortina de Ferro Aérea do Século XXI: as Ucrânias do Ar
abstract: “Ukraine” means borderland and the concept of border encompasses the notion of lines that determine the land, sea and air spaces of sovereignty and responsibility of all Nation-States. As so, we can argue that aerial ukraines are defined by the so-called Flight Information Regions (FIR). The Nation-States or the groups of Nation-States should guarantee the safety and assistance ofaircraft operating in their respective FIR. However, they can also close them for national security reasons, especial
journal: Political Observer | Revista Portuguesa de Ciência Política (Portuguese Journal of Political Science)