After all, the objective – to identify a few terrorists hiding among millions of law-abiding citizens, before they commit a violent act – is the equivalent of finding a needle in a haystack. The recognition of the flawed logic behind reinstating border controls is probably why police officials have remained guarded in discussing the issue.
而这些调查活动需要一切可能的帮助。毕竟，其目标——在暴力行动发生前找出藏身于千百万守法公民中的一小撮恐怖分子——无异于大海捞针。认识到恢复边境控制背后的逻辑漏洞也许是警察官员仍对这一问题的讨论保持谨慎的原因。