"'Extradition' is the formal surrender of a person by a State to another State for prosecution or punishment. Extradition to or from the United States is a creature of treaty. The United States has extradition treaties with over a hundred nations, although there are many countries with which it has no extradition treaty. International terrorism and drug trafficking have made extradition an increasingly important law enforcement tool. [...] This is an abbreviated version of CRS [Congressional Research Service] Report 98-958, Extradition To and From the United States: Overview of the Law and Recent Treaties, by Michael John Garcia and Charles Doyle, without the appendices, footnotes, and citations to authority found in the longer report."
CRS Report for Congress, RS22702
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html