NOTE: Promotional materials, including catalog and flier illustrations, used a draft version of the cover that included different images. A key to those images may be found here.

First Row: Beverly Agnew, Harold Agnew, Samuel Allison, Luis Alvarez, Herbert Anderson, Harold Argo, Mary Argo, Jean Bacher, Robert Bacher, Kenneth Bainbridge, Hubert Berry, John Balagna, Richard Baker

Second Row: Hans Bethe, Rose Bethe, Norris Bradbury, Rebecca Bradford, Hugh Bradner, Egon Bretscher, James Bridge, Berlyn Brixner, Bernice Brode, Robert Brode, Melvin Brooks, Howard Bush, Spencer Bush

Third Row: Margaret Caldes, William Caldes, Owen Chamberlain, Robert Christy, Charles Critchfield, Winston Dabney, Nicholas Dallas, Neil Davis, Margaret Dike, Benjamin Diven, Claire Dreesen, Donald Dreesen, Priscilla Duffield

Fourth Row: Robert Duffield, Enrico Fermi, Richard Feynman, Donald "Moll" Flanders, William Fowler, Stan Frankel, Otto Frisch, Darol Froman, Klaus Fuchs, Lewis Fussell, Alvin Graves, Elisabeth Graves, Elizabeth Greisen

Fifth Row: Kenneth Greisen, Eugene Greuling, Leslie Groves, Ted Hall, Edward Hammel, Louis Hempelmann, R.W. Henderson, William Higinbotham

Sixth Row: Joseph Hirschfelder, Marshall Holloway, Lilli Hornig, Eric Jette, Theodore Jorgensen, Joseph Kennedy, Donald Kerst, L.D.P. King

Seventh Row: George Kistiakowsky, Emil Konopinski, Alfred Large, Julian Mack, Theodore Magel, John Manley, Anita Martinez, Antonio Martinez, Donald Mastick, Dorothy McKibben, Joseph McKibben, Edwin McMillan, Harry Mefford

Eighth Row: Nicholas Metropolis, Herbert Miller, Russell Miller, Philip Moon, Seth Neddermeyer, David Nicodemus, James Nolan, William Ogle, Arthur Olofson, Robert Oppenheimer, Kitty Oppenheimer, Paul Olum, Vivian Olum

Ninth Row: William "Deke" Parsons, William Penney, Harriet "Petey" Petersen, John Price, Norman Ramsey, Frederick Reines, Louis Rosen, Bruno Rossi, Joseph Rotblat, Nellie Rushing, Horace Russell, Arthur Schelberg, Raemer Schreiber

Tenth Row: Emilio Segre, Charlotte Serber, Robert Serber, Duren Shields, Cyril Smith, Roderick Spence, Hans Staub, Richard Taschek, Augusta "Mici" Teller, Edward Teller, Ernest Titterton, James Tuck, Stan Ulam

Eleventh Row: Virgil Fermin, John von Neumann, Arthur Wahl, Robert Walker, Roger Warner, Victor Weisskopf, Theodore Welton, John Williams, Frances Wilson, Robert Wilson, Etta Woodward, William Woodward, Albert Birch

All photographs are from Los Alamos Laboratory security badges, courtesy of the Los Alamos National Laboratory Archives.