Questions over personal jurisdiction over foreign defendants in the United States arise when foreign nationals commit crimes against Americans, or when a person from or in a different country is sued in U.S. courts, or when events took place in another country. Such cases arise when crimes are committed on the high seas or on international flights, when crimes are alleged to be committed by or against Americans in foreign countries (such as under the Foreign Corrupt Practices Act), or when crimes are committed by foreigners against Americans. The Internet also allows computer crime to cross international boundaries.