The Party, in addition, helped arrange the transfer of funds, established mail drops (where espionage communications come to a third person, later to be given to the espionage network), and operated couriers. In one instance a Party member even served as an interpreter for a Soviet agent. Even from these early days, however, evidence existed that the Soviets were aware of the dangers of too close an affiliation with the United States Party. An espionage operation might be jeopardized by a known Party member’s participation. Similarly, in the event of a “blow-up,” the Party, in the public’s eyes, would be linked directly with a foreign power, Soviet Russia. This was one thing both the Soviets and Party officials wanted to avoid. Hence, by the early 1940’s there was a definite lessening of direct Soviet dependence on the U.S. Party for espionage assistance. The Soviet spy system, moreover, was now better able to stand on its own feet. In 1924, Amtorg Trading Corporation (a Soviet government commercial agency) was established. This gave the Soviets their first “legal” base for espionage operations. In this way persons or institutions in a country openly as representatives or agents of a foreign power have an ideal cover to fulfill their assignments of clandestine espionage. In 1933 diplomatic recognition was afforded the Soviet Union. Now trained espionage agents, operating under diplomatic immunity, could direct operations. After World War II Russians assigned to the United Nations in this country gave additional striking power to Soviet espionage. Moreover, assistance was possible through the espionage networks of Soviet satellite countries operating in the United States. This lessening of direct Soviet dependence on the Party was a gradual development. Whereas in the early 1920’s Party and espionage work were often indistinguishable, the Soviets now instructed members tapped for service to drop all connections with the Party. One old-time Party member, turned spy, told the FBI that the Soviets had instructed agents to conceal their Party affiliations. This soon became a standard technique. If engaged in espionage, cut off all connections with the Party, even contacts with former Party friends. Ethel Rosenberg, for example, indicated that she no longer bought the _Daily Worker_ at her usual newsstand. Another agent, while in the company of a Soviet superior, stopped to purchase a communist publication. He was severely reprimanded. The communist label might betray the espionage ring. The Soviets, however, still depended on communists or sympathizers for assistance. In one major apparatus detected by the FBI, for example, twelve of seventeen participants had been Party members. Both Ethel and Julius Rosenberg, executed as Soviet spies, had communist backgrounds.