mr. bergen and mr. al-muslimi, very disturbing testimony.and this might be due, professor brooks or to mr. bergen, or to anyone, we have blowback when we do demand airstrikes -- when we do manned airstrikes. what is the difference? in other words, what is, i think you wrote in your testimony, i thought i was here, professor, for your oral testimony, but that they are civilian, obviously civilian casualties when we do manned airstrikes. is there a qualitative difference? on income is there really? welcome anyone who wants to answer that. >> senator franken, this gets to the heart of what others try to get at my testimony, which is one should answer the question that is legal to do a strike, and that it's good strategy to do a legal strike, when you're then selecting a platform, a remotely-piloted aircraft actually gives you better precision with a small warhead with assistance overhead with the ability to abort at the last minute. with a whole chain of command and lawyers watching with intel analysts who are not getting shot at. so once you d