Who, after World War II, used the help of the "Bricha" organization?

Bricha was the underground organized effort that helped Jewish Holocaust survivors escape post–World War II Europe to the British Mandate for Palestine in violation of the White Paper of 1939. It ended when Israel declared independence and annulled the White Paper. After the Kielce pogrom of 1946, the flight of Jews accelerated, with 100,000 Jews leaving Eastern Europe in three months.