=n wsBBY: Any one else have a question for Mr. Marshall? Before we leave the sampling program, I'd like to mention a subject which Golonel Holuman is connected with. Several weeks ago we were considering this stratospheric storage, andi concluded then as - we did thie morning, that it probably existe, that there is probably a lot of radioactivity in the high layers cf the atmosphere, and the question is how to preve this. It is obvious from remarks this aorning that rainstorms and the vagerics of weather make the assay of rains « rather mrelishle way of establiahing it quantitatively. 4o we wonder how to sample the high atmosphere and get samples down which give us some qualitative notion cf the content cf radioactivity. There are two aspects ~— one is to got up there, and the other is to get the radioactivity out of the air. We asked Colonel Holsuan to make some measurements on jet aircraft which are operating out of Kirtland, and I'd like to give him a couple of minutes to tell us about that. I know these data are vary poor, but there is some radicactivity on these airplanes, and as I understand it, they were not in any stemic aloud that you knew of? ROLZMAMN; That's right, Dr. Idbby. About « month or so ago, Dr. libby requested just a yos-and-no anaver as to whether any of our jets were picking up any radicactivity. Se we ran a *quick- and-dirty" test on this. There were about fifteen aircraft. We made sure that the airaraft vere not those which might have ee DUE ARCHIVES