Rosenberg Spy Ring
The Rosenberg Spy Ring was a Communist cell of engineers headed by Julius Rosenberg and his wife Ethel. Among Rosenberg spy ring was the Jew David Greenglass, an atomic spy working on the Manhattan Project and his sister Ruth who offered her apartment as a safe house. Lona Cohen, married to Morris, had been courier to Julius and Ethel Rosenberg but the Cohen’s were quickly spirited to Mexico then to Moscow following the arrest of the Rosenberg’s later resurfacing in the United Kingdom using the names Peter and Helen Kroger heading the Portland spy ring. Lona was also part of a ring of atomic spies linked to the Manhattan Project that was far more damaging than the well-known Rosenberg ring.