i'm mike birch from the university of southern california with professor glass. my question entails we talked about single-purp purpose aircraft, the a-10 charlie with new avionics and i realize three skaud rons were recently deactivated a couple months ago. is a-10 an aircraft that will serve in the near future or can it be replaced by a suitable replacement aircraft? >> i think the reason why we were able to reduce the number of a-10s is that we can do, unlike 20 years ago, the a-10 job from other aircraft. whereas the a-10 really does that and does it very well but that's all it does. it's simply a matter of putting the money where you have the most capability, and that's what lies behind the decisions of the a-10. that is an example of what i was talking about. >> thank you, sir. you just mentioned the u.s.'s plan in sending more carrier and bomber to east asia -- asia-pacific region. do you feel that might irritate china? >> could you repeat that? >> do you think that might irritate china and also the other question is on south china sea under the mutual def