![](https://cdn.firespring.com/images/2a9ca17f-c339-4fca-8838-4ef5d65db8c4.jpg)
Patrick Weadon discusses the importance of cryptology to national security for American History TV - CSPAN-3 - part of the American Artifacts series. This is a 2 part feature on the NCM viewable on the American History TV Web site or on CSPAN-3. Click to view the videos via American History's Web site.