The Army's interest in significant aviation improvements actually started, or at least gained steam, in the 1960's during the extended combat we had in southeast Asia where a lot of problems in the utilization of the rotary wing aircraft came to a head, and I'll talk about those in more detail. What I would like to do is go through how the Army has responded to those problems that were revealed, through R&D and even more specifically in the diagnostics area. When I say diagnostics, what I'm talking about is the second category of NDI that I see, the first category being the one I think that most people here have a prime interest in and that is the one time, static inspection during manufacture, a verification of quality control. The other type is the repetitive in-service inspection.