What does that mean? Well, the explanation was that if there were a terrorist act, let's say in Canada, and the perpetrators were known, then having this information would make it possible to dig back if it were, say, in two or three years through this information to look for any possible accomplices or associates that the terrorists might have travelled with.
Eh bien, on m'a expliqué que si un terroriste agissait au Canada, par exemple et que l'on sache de qui il s'agit, grâce à cette information, il serait possible de remonter deux ou trois ans en arrière pour retracer d'éventuels complices ayant pu voyager avec le coupable.