The concern is that we have an increasing gang presence in prisons. That is part of the changing profile. As an adjunct to it, there is also an increase in the presence of drugs in prisons, if you can believe it. You wonder how they get in there, but apparently they do, and they continue to.
Part of what the Sampson report sought to do was identify ways in which we could limit that. It's a very important issue from the perspective of those who work in the prisons, for their safety and maintaining a safe prison population. The presence of drugs and their influence contribute to all kinds of difficult behaviours among prisoners, which put those who work in our prisons at risk.
Ion scanners have been introduced to deal with questions of visitors bringing in contraband, with some success. I'll ask Mr. Hippolyte to speak to that. Drug-sniffer dogs are not everywhere. They're not dealing with everyone coming in, but there is that resource available, and increasingly available in the prisons.
Perhaps you want to add to what I've said.