viable economic entity. >> let's talk about the battle for the donbas region, getting word that the russians are sending attack helicopters. you are an air power guy. what does that mean? >> so that means that they are using what amounts to what the russians call their combined arms army. so they are using all the elements of power that they have at their disposal, conventional power, including infantry vehicles, everything including armored personnel carriers, plus helicopters and it sounds like fixed wing aircraft as well. so what does it mean? it means that they are putting all these forces together in order to provide a way in which that they can attack everything in a very clear combined way. so if you take this town as an example, they can use these areas to surround potential ukrainian forces and cut them off from resupply efforts. they can corner them. they can do all kinds of things