The second document in this release, „Schengen Overview“, is dated January 2012 and details guidelines for border officials in the EU‘s Schengen zone and the threats their procedures might pose in exposing the „alias identities of tradecraft-conscious operational travelers“, the CIA terminology for US spies travelling with false ID during a clandestine operation. It outlines how various electronic systems within Schengen work and the risks they pose to clandestine US operatives, including the Schengen Information System (SIS), the European fingerprint database EURODAC (European Dactyloscopie) and FRONTEX (Frontières extérieures) – the EU agency responsible for easing travel between member states while maintaining security.