Build a wall, wild boar will fall: Denmark erects barrier to keep out German pigs

42-mile fence on border with Germany aims to protect pig farms from African swine fever

The United States isn't the only country with a border wall controversy these days. However, Denmark's planned 42-mile (70km) fence along the German border is intended to keep out not people but wild boars, which authorities say threaten to bring disease to Danish pig farms.

Construction on the fence was beginning on Monday along the northern edge of the German state of Schleswig-Holstein. Danish lawmakers and the country's environmental agency approved the project last summer, arguing it would help farmers protect their pigs against African swine fever (ASF).