Vue trem 1) eS fe ADMINISTRATIVE MARKING £.0. 12085, Sectio n gsigd By)WARS, Date 1/J/IZ._. REPRODUCED AT THE NATIONA L ARCHIVES 411302 G-238-F PREUSS/1w Dr, John 0. Clark _lee ames Saientifio Laboratory PB, 0. Box 1663 Los Alamos, New Nexico Dear Dr. Clark: The Fresident has requested the Atomic Inergy Sommiasion to convey bis commendation te the seteatific pergranal responsible for the success of the 1948 atcmle wesgen.. teat pregrem at Eniwetek 41012, 4s ak Assiatant Scientific Director your contrimaiien + the test program hae been cutetending. Tour aseiahance in plamaing the test progres, particnlarly the blast measurement phases, was extremely valuable, Wash of the aredit for the finely preparation of ths Proving Ground is due to your aetiyities as Cosniestes representative at Bxivetex prier te the arrival of Task Fores, Your activities in thie capueity reflected your abilities es a scientist and as an engineer. Ae a roenlt of the 1958 proof teats cur weapons program hae been materially advanced, You pereenally hare rendered a great service to the nation amd it is the Commission's privilege to extend te you the commendation of the President. Sincerely yours, BEST COPYAVAILABLE David 3 Lilienthal copies: 1 - Addressee USTTRD STATES APOKIC MIRGY COMMISSION _-Chai rman 2&3-~ Mr, Lilienthal’ 4 - Test Director Files 5 - Reader File 6 - DMA Files COPY FOR: MR. LILIENTHAL