[Emma]

i thought the technical information they passed on was crude drawings by a non-scientist.

[gwmoore]

The "crude drawings" were of technology which the Soviets may not have thought of and were the crucial item in making that particular weapon design function. Even though the "secrets" are now pretty much publicly known, I still don't like discussing exactly what they were, kind of a reflex habit from myriad numbing security briefings ;-) The briefings never quite leave your thoughts LOL...
Greg

[DPB101]

The Soviets were stunned when the Rosenberg ring told them we were building an implosion plutonium bomb. They had not considered that method at all (plutonium is much easier to make than uranium is to refine). Julius also gave the Soviets the plans to our first jet fighter--plans which were used to build the MIG-15 which was a big surprise to our pilots in Korea. In addition, he handed over a working proximity fuse. The Soviets used that design to shoot down Gary Powers and his U-2. The first Soviet bomb was an exact copy of the bomb we dropped on Nagasaki.