Bishopstown Community School student, Anna Mustata, is 16 years old. An aspiring novelist and gifted mathematician, she won silver in the Mathematics Olympiad in Minsk in 2015, won a trip to Brussels after her BCS team won the Lord Mayor’s debate last month, and won a national essay competition hosted by the Law Faculty of UCC. Here, in an extract from her winning essay, Anna explains why, despite the increasing number of terrorist attacks, the EU principle of free movement must remain