EUobserver's 'Fortress Europe' series looks at refugee and immigration networks operating on the edge of Europe, focusing on the 12.5-km Greek 'wall' completed late last year.

EU border control agency Frontex is looking to buy drones and satellite images to monitor migrant behaviour beyond the Union's borders.

Poor labour conditions, racism and squalid housing is making African migrants in Istanbul dream of the EU despite its crisis.

Smuggler groups - kacakci - who get people from Turkey into the EU make more money each time the Union takes steps to protect the border.

EUobserver's Nikolaj Nielsen visited the Greek-Turkish border in November to see what 'Fortress Europe' means in practice for refugees and people smugglers trying to get into the Union.

Afghan refugees trapped in legal limbo in Turkey are pursuing new Balkan routes to get into the EU.