For much of their lives, Michael and Robert Meeropol, the sons of Ethel and Julius Rosenberg, who were sentenced to death in 1953 after being convicted of passing atomic secrets to the Soviet Union, fought to have their parents' innocence recognised.
In particular, they always insisted that their mother was wrongfully convicted.
The release of a testimony by the late David Greenglass - Ethel Rosenberg's brother, who implicated his sister as a spy at her trial - by a federal court in New York City last week gives them new ammunition.
When testifying before a grand jury in 1950 - more than six months before his sister's trial - Greenglass appeared to deny that his sister engaged in any espionage, which he only attributed to Julius Rosenberg and others. Greenglass, who was a spy himself, served nine years in prison for treason.
