The high profile trials and tribulations of Army Pfc. Bradley Manning and Edward Snowden, both of whom leaked large amounts of classified government information to the media, have placed renewed focus and debate on the importance of leakers and whistle-blowers in American politics. The following is an interactive timeline chronicling some of the most famous — and infamous — leaks in U.S. history.


Matthew Green

Matthew Green runs KQED’s News Education Project, an online resource for educators and the general public to help explain the news. The project lives at

Sponsored by

Become a KQED sponsor