Publishers, owners and other corporate executives, especially advertising sales executives, can try to use their powers over journalists to influence how news is reported and published. Journalists usually rely on top management to create and maintain a ""firewall"" between the news and other departments in a news organization to prevent undue influence on the news department. One journalism magazine, Columbia Journalism Review, has made it a practice to reveal examples of executives who try to influence news coverage, of executives who do not abuse their powers over journalists, and of journalists who resist such pressures.