Federation of American Scientists
Fas: Report of the Independent Counsel for Iran/contra
This page from the Federation of American Scientists links to all chapters of the "Final Report of the Independent Counsel for Iran/Contra Matters" released by the Independent Counsel Office.
PBS
Pbs: The Iran Contra Affair
This site from PBS provides a good summary of the Iran-Contra Affair. This is a summary of how this event is covered in the PBS film " The American Experience".
Tour Costa Rica
The Nicaragua Revolution
This article describes the Nicaraguan Revolution, with a focus on its relations with Costa Rica.