John Wheeler describes some of the principal contributors at Los Alamos National Laboratory.

SOME PRINCIPAL CONTRIBUTORS AT LOS ALAMOS

It interests me how the nature of the work that our Los Alamos colleagues did was attuned to their personalities. Edward Teller, ebullient, breezy; Carson Mark, very much aware of what was going on and very practical-minded with a good sense in assessing how things were; Stan Ulam, imaginative, always looking for something clever or some central principle that he could use, and mathematically-minded. I can't recall that we had any special guidance at this time on our problems by the men who were later to be so important in getting a test, people in the Test Division. I don't know why I can't even now remember their names. And I can't remember Bradbury getting to the technical side very much. Marshall Holloway had had so much to do with tests that he was always a good person to talk with, and Al Graves. Louis Rosen I remember as a dynamic personality, but I can't recall any interaction with him on the problem of the super, although later on I did very much appreciate contact with him on his efforts to build what he called a meson factory at Los Alamos to experiment with this particle that had been only available before in the cosmic rays and in a few nuclear experiments. And there was Harold Agnew; I think he had taken part later on in some of the H bomb testing work.