The big part for me was to be told by Immigration, the day they all disappeared, that this happens all the time, and that people come to Canada and disappear, never to be seen again. I really felt that I should have had a bit of a heads-up on this before I spent six months going through the program, getting registered, and getting the approval from the government to bring these people, only to have them tell me that afterwards.
On April 15th, 2008. See this statement in context.