one in vandenberg air force base, that are coupled with other radars around the world. intended to defend the continental united states, not against a full scale attack from russia. but against limited attacks from other adversaries. this is a policy that the u.s. has sustained. obama sustained the bush policy. he's chosen not to augment the capability. that also has been attacked by republican senators. so we have a system in place, again, just to demonstrate the willingness to defend the united states against limited attacks. and we have this growth of regional network systems that are intended to make it more difficult for them to attack regional targets. final point, conceptually, missile defense involves three layers of attack. sometimes called a layer defense. slightly artificially the trajectory of the attacking missile is divided into boost phase and terminal phase. and different elements of the defense are focused on each phase of the trajectory or the attacking missile. so there's boost phase intercept, which is tough. there's recourse intercept, and there's t

i live next to vandenberg air force base with myself and my father the editor-in-chief of the local newspaperand watch the shuttle happening in my town. i have an 8-year-old daughter who sings along with your voice and others talking about it. [applause] >> a series of creative youtube videos which takes publicly available clips. it's very creative and they are hugely popular. .. if it's the sun going said it would in 5 million years. if we stay here we are doomed, and as far as we know, we are at. >> this is the point was made by stephen hawking that we have to be a multi plant species otherwise we are doomed because something could happen, an asteroid or what have you. here is my rebuttal to that if i may. >> may i finish the question? >> yes. >> do you feel a motivation like that is valuable as a component? the economics are part of feeding our country, part of feeding ourselves. >> i don't think it is a good enough driver because i don't believe it. and i will tell you why. and he made this point we have to be able to plant species otherwise, with all the eggs in one basket you go extinct