mr. baylis's reference to live interference notices? mr. clark: yeah, so the idea would be can you in real time be able to get a notification -- instead of normally what happens when you try to deconflict spectrum is you just detect the other user out there and then you have to respond to that. you'd want to augment that with a notification that comes from that other user to automatically tell you i'm going to use the spectrum now and here's the level and power and the frequency i'm going to be at, and then the systems can coordinate between themselves. so instead of simply responding to what they see in the environment, they're communicating with each other to coordinate their use of the spectrum in real time. sen. wicker: do you subscribe to his point of view in that regard? mr. clark: i think definitely that technology is certainly viable. the challenge will be getting it implemented into the defense systems that are multiple generations in some cases old. sen. wicker: just quickly, if dr. hazlett and mr. pearl could respond and perhaps