In 2004, Gunn added a regular segment on biotechnology, BioTech Nation. It has emerged as the only regular weekly mainstream programming on biotech on the national and international scene, and features interviews with biotech leaders. In its regular feature: “BioIssue of the Week”, Gunn discusses the breaking news of the day with award-winning science journalist, David Ewing Duncan.

In the U.S., Tech Nation can be heard four times each weekend on the National Public Radio website’s 24-hour Program Stream (npr.org). It airs on nearly 200 public radio stations, with multiple airtimes on the NPR Channels on XM-Sirius Satellite Radio. Globally, Tech Nation is aired three times weekly on the NPR Channels of Sirius Internet Radio and airs 25 weekly to 177 countries via Armed Forces Radio International. Tech Nation podcasts remain permanently archived on the Internet, enabling anyone, anywhere to listen to these materials on demand.