Airline passenger records raise significant issues with privacy laws. Information on European travellers is passed to authorities in the US if they are flying there; although some are concerned this information will be mis-managed.
Valsamis Mitsilegas, Professor of European Criminal Law at Queen Mary, University of London said: “Europeans regard these tools as disproportionate to what is required to fight terrorism. Many Europeans insist that they shouldn't have to prove these techniques are detrimental to their security but, instead, that governments should have to prove these techniques actually are necessary.”
Read the full article in the New York Times