Economist article presents classic examples of “indicators” that can be used to formulate intelligence “warnings” for decision-makers. The temporary hijacking of the Dewi Madrim was by terrorists learning to drive a ship, and the kidnapping (without any attempt to ransom the officers) was aimed at acquiring expertise to help the terrorists mount a maritime attack. In other words, attacks like that on. that. are the equivalent of the al-Qaeda hijackers who perpetrated the September 11th attacks going to flying school in Florida.””]
Source: https://taosecurity.blogspot.com/2003/10/lesson-on-indications-and-warning-i.html