We have seen what terrorist groups are capable of doing with civilian aircraft; we can imagine what irreparable damage they could cause, were they in possession of weapons of mass destruction.
我们已经看到恐怖主义组织可以对民用飞机采取什么行动；我们可以设想，如果他们拥有大规模毁灭性武器，将会造成怎样无法挽回的破坏。