The Attorney General made his designations on the basis of information furnished to him by the Federal Bureau of Investigation and such other investigation as he deemed necessary. No hearings were accorded to organizations thus incidentally affected. This. of course. afforded an expeditious and unimpeded development of the list. but it laid the basis for subsequent complications. The program was virtually brought to a halt following the decision in Joint AntiFascist Refugee Committee v. McGrath. 341 U.S. 123 (1951). by which the practice of designating organizations without hearing on their designation was brought into question. In this case. the Supreme Court reversed and remanded petitions for injunctive relief brought by three organizations complaining of their designation without notice or hearing.