Countries along the so-called 'Balkan route', where hundreds of thousands of asylum seekers crossed in 2015-2016, are pledging not to allow migrants to cross this time.
In an political climate that has turned to the right in the EU - with prime ministers from Hungary and Austria both pursuing a hardline anti-migration policy - many countries are eager to demonstrate that migrants will not cross the EU's borders this time.
Along with Greece, Hungary also announced over the weeken...
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