I think the deterrent effect and the message has been sent since Salt Lake City. The athletes know that the noose is tightening. They will probably, I hope so, be more careful and wiser. But you can't guarantee that.
They were caught out of competition. We tested them at private homes where they were staying. I'm a strong believer in unannounced, out-of-competition testing. This is the strongest deterrent and most effective way.