Skip to Main Content

National Security, Espionage, and Intelligence in American History: Welcome and Government Information

Curator for American History and Diplomacy

Profile Photo
Joshua Cochran

Welcome and other guide content


Greetings and welcome to the research guide on National Security, Espionage, and Intelligence. This guide will take you on a journey through sources on:

Government Information (below)

FBI Files

20th Century Files

Archival Collections at Yale

Country data and Analysis

Secondary Literature

Think Tanks and RSS Feeds



Getting started with government information

Homeland Security Digital Library

The Homeland Security Digital Library (HSDL) consists of documents related to homeland security policy, strategy, and management. Sources include federal, state, and local governments, IGOs, nonprofit and private sector entities, and think tanks and research centers. The public part of the collection includes over 79,000 public domain items; Yale researchers have access to the full collection of 157,000 items.