In the United States, the term "underground" did not mean "illegal" as it would in other countries. The First Amendment and various court decisions (e.g. "Near v. Minnesota") give very broad rights to anyone to publish a newspaper or other publication, and severely restrict the government in any effort to close down or censor a private publication. In fact, when censorship attempts are made by government agencies, they are either done in clandestine fashion (to keep it from being known the action is being taken by a government agency) or are usually ordered stopped by the courts when judicial action is taken in response to them.