When you look at these types of systems...and I think it relates very much to exactly the type of work that we do. We do audits. When we do audits, lots of times what we do is look at systems. Obviously, when you're dealing with safety systems related to aviation and that sort of thing, making sure that those systems work properly is extremely important.
In this type of work, one of the main things that needs to be done is making sure that the system is properly designed, and then the system executes the way it should execute. Part of making sure that a system executes is doing some on the ground testing. That can be part of auditing, but fundamentally, the way that audits tend to work is to look at systems to determine whether the systems are reliable and are operating the way they are supposed to operate.