1. I believe the answer is: Julius Rosenberg
Julius Rosenberg was actually born in united states, but he was recruited by the communist League of USA in his Teenage years.
Before he was prosecuted by united states government, he managed to leak information about radar, sonar, and jet propulsion engines for the soviet government.
2. I believe the answer is: David Greenglass
David Greenglass is the brother of Etherl Rosenberg, Julius' wife in united states. Greenglass worked on the manhattan project and supply all files filled with top secret information from los angeles to Julius' residence. He receive 10 years in prison for this crime.