I think there's some abuse. There are some people who from time to time attempt to go across with an out-of-date NEXUS card. Generally speaking, the key is getting the vet done right at the initial time of issuance. But when the renewals do occur, we also re-screen. So I'm reasonably optimistic that some of the issues raised we can get to in terms of improvements in re-vetting.
On March 12th, 2009. See this statement in context.