Julius and Ethel Rosenberg // Soviet spies, Question?

Question

to those who dont know Julius and Ethel Rosenberg were executed as Soviet spies following a major cold war spy trial...June 19, 1953:

Its been reported that in June 30, 1948: Max Elitcher and Morton Sobell drove to Catherine Slip where Sobell met with Julius Rosenberg to exchange microfilm...
that was in the trial...
but today, has anyone ever found out what was in that Mircofilm? if so where could I get a copy?

Answer 1

When the Soviet Union fell, the KGB files were opened and it was proved that the Rosenberg's were Soviet spies. That microfilm was classified by both sides as Top Secret with no expiration date. It will be Top Secret long after everyone alive is dead several times over.

Answer 2

Since their espionage was involved with the atomic weapons development program, whatever was on that microfilm had some relationship to that weapons development. Given that supposition, the contents of that microfilm are probably still classified.