Why terror suspects in Europe slip through security cracks
How could Youssef Zaghba, a terror suspect be on Italy's watch list and not in the British one? And why didn't the presence of Zaghba's name in the SIS prompt U.K. authorities to keep an eye on him? The London Bridge attack raises issue about the sharing of security information between European countries, at a time when terrorists have been shown to move often across the E.U.'s open borders.