Britain and France have pledged to build a “big, new wall” in the French port city of Calais amid an increasing crackdown against the refugees living there, many of whom are seeking to reach Britain by stowing away on trucks and lorries headed through the Channel Tunnel. As many as 7,000 refugees are currently living in the Calais refugee camp, despite French authorities’ repeated efforts to attempt to close the camp. The proposed four-meter-high wall will seek to block refugees from entering the port’s main road. This comes as a new UNICEF report says 50 million children have been displaced worldwide. The number of unaccompanied children who have applied for asylum tripled between 2014 and 2015.