We are credible in some aspects and not in others.
For example, not being part of the anti-missile system costs us in credibility, because it means we are choosing what we want to defend ourselves against, when our defence should be total.
On the other hand, we have to understand what is important for us. When the Americans talk to us, they talk about defence and security. That is their psychological nature. When we, Canadians, talk to them, we talk to them about economics. The two things go together. If the Americans don't feel secure with their Canadian ally and friend, they are less inclined to talk about economics. So it is in our interest to invest in defence so they feel secure.