The phenomenon of foreign terrorist fighters, many of whom are Union citizens, demonstrates the need to reinforce checks at external borders with regard to persons enjoying the right of free movement under Union law.
Léiríonn feiniméan na dtrodaithe eachtracha sceimhlitheoireachta, ar saoránaigh den Aontas go leor acu, gur gá seiceálacha a dhéantar ag teorainneacha an Aontais a athneartú a fhad a bhaineann le daoine a bhfuil an ceart chun saorghluaiseachta acu faoi dhlí an Aontais.