VOICED : Bulgaria's new 'Iron Curtain' keeping people out, not in

Bulgaria is reinforcing its southeastern border with Turkey due to increased migrant pressure. The country is constructing a new fence to prevent migrants from entering, following the closure of the Balkan routes. Local authorities are working to complete 82 miles of fencing to support border police. The construction faced challenges due to overgrown areas, but the fence has eased local concerns. Historically, this border was heavily guarded during the Warsaw Pact era, when Turkey was seen as a major enemy.

What challenges did the construction of the fence face according to the text?

What historical context is provided regarding the border security measures in Bulgaria?