Development achievements in fission weapons have included: ee ee DELETED my pELere> Status of Thermonuclear Development in Mid-1953 DELETED een “The “Engineeringof these devices intomanageable,practical, andconvenient bombswill'be the major developmental objective. In planning its work for 1948, LASL noted that there were on-site activities in regard to thermonuclear reactions and that they would be somewhat reduced in keeping with neces- sity to firm up" the then existing knowledge of fission weapons and in keeping with the peace-time philosophy of a studied, scientific approach to developmental problems. The plan recorded, however, that thermonuclear "work will continue on theoretical calculations and on experimental observations of appropriate nuclear constants." 62 ALCS ¢7