Articles in this set
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The Schengen area and enlargement policy are coming under increasing strain.
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The EU's borders are much tighter in some areas than others, and that can cause problems.
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The problems in Cyprus cast doubt on the EU's claims that enlargement can help solve territorial disputes.
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A complex, close and at times contentious relationship.
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A look at the EU's border issues.
Europe's borders

Just as national borders have shaped the identities of Europe's nation-states, so the European Union's have contributed to the way the Union sees itself.