In light of recent events involving IEDs and firearms, it is reasonable to assume that this will be the norm. Attackers favor these forms of violence through trial and error. After attacks at special event and hotels in Paris, and Mumbai, detection is just as important response.
The terrorists tools of the trade don't just appear. They are transported to the location and placed when they can be accessed quickly. This means, what can be placed can be found by a trained team.
Using an experienced Dog Master, detection K9 teams train to find explosives in a wide-range of applications and environments. Training includes the use of real explosive substances, which are certified and closely regulated by Natural Resource Canada. Once completed, these teams are certified and licensed for work. Training is ongoing, to minimize the chances of a mistake.