Best Answer - Chosen by Voting
Hmm, good question and I think newspapers might well use the word kaping instead. Thinking about it, then I would associate "gijzeling" with kidnapping. In other words the object involved is a person. "Kaping" is more used with vehicles. (We also have the saying: "kapers op de kust")
In the case of yesterdays event, a "gijzeling" would refer to a situation where the passengers are being kidnapped in the plane, but the plane itself is not necessary in control of the bad guys. A "kaping" however would indicate that the plane is under control of the bad people (either directly or by threatening the pilots).
Which one is more suitable is something you can decide.
