He held amateur radio operator license KB2GSD and narrated a 2003 American Radio Relay League documentary explaining amateur radio's role in disaster relief. The video tells Amateur Radio's public service story to non-hams, focusing on ham radio's part in helping various agencies respond to wildfires in the Western US during 2002, ham radio in space and the role Amateur Radio plays in emergency communications. "Dozens of radio amateurs helped the police and fire departments and other emergency services maintain communications in New York, Pennsylvania and Washington, DC," narrator Cronkite intoned in reference to ham radio's response to the terrorist attacks on September 11, 2001. Unusually, Cronkite was a Novice-class licensee—the entry level license—for his entire, and long, tenure in the hobby.