ABC NEWS: "URGENT MANHUNT ACROSS EUROPE FOR TERROR PLOTTERS Spanish AG: 3 Cell Members May Be on a Mission to Attack Outside of Spain" by Richard Esposito and Paco Medina (ARTICLE SNIPPET - Page 2: "Spanish authorities believe the intended target was the Barcelona subway system and that the plot would have used two to four suicide bombers wearing explosive vests that were to be detonated simultaneously while another plotter detonated three to four more devices placed in the subway, investigative sources told ABC News.") (January 25, 2008)