after 9/11 especially. commercial air traffic civil aviation authorities and the u.s. military are always in constant touch around the clock. so if there is a situation where a civilian airliner disappears, heaven forbid, of course, the u.s. military knows about it and then does scramble jets. if there's an aircraft flying in restricted air space, they know instantly from the faa, they scramble jets to go up and try and look to see what is going on. it does raise the nightmare scenario that the u.s. military has faced since 9/11 if there is an aircraft that cannot be identified, that ultimate scenario of having to shoot it down. the concern, when they look at places like this area of asia, they didn't seem to know anything about what was going on in their own air space. wolf. >> barbara starr at the pentagon, thank you. let's bring in miles o'brien,