In law enforcement, a sting operation is a deceptive operation designed to catch a person committing a crime. A typical sting will have an undercover law enforcement officer, detective, or co-operative member of the public play a role as criminal partner or potential victim and go along with a suspect's actions to gather evidence of the suspect's wrongdoing. Mass media journalists occasionally resort to sting operations to record video and broadcast to expose criminal activity. In law enforcement, a sting operation is a deceptive operation designed to catch a person committing a crime. A typical sting will have an undercover law enforcement officer, detective, or co-operative member of the public play a role as criminal partner or potential victim and go along with a suspect's actions to gather evidence of the suspect's wrongdoing. Mass media journalists occasionally resort to sting operations to record video and broadcast to expose criminal activity. Sting operations are common in many countries, such as the United States, but they are not permitted in some countries, such as Sweden. Sting operations are fraught with ethical concerns over whether they constitute entrapment. Law-enforcement may have to be careful not to provoke the commission of a crime by someone who would not otherwise have done so. Additionally, in the process of such operations, the police often engage in the same crimes, such as buying or selling contraband, soliciting prostitutes, etc. In common law jurisdictions, the defendant may invoke the defense of entrapment. Contrary to popular misconceptions, however, entrapment does not prohibit undercover police officers from posing as criminals or denying that they are police. Entrapment is typically a defense only when suspects are pressured into being implicated in a crime they would probably not have committed otherwise, but the legal definition of this pressure varies greatly from jurisdiction to jurisdiction.