I just noticed that StoryCorps is using an Airstream for their mobile recording studio. I always enjoy listening to these conversations. From their website:
StoryCorps is one of the largest oral history projects of its kind. Since 2003, StoryCorps has collected and archived more than 50,000 interviews from more than 80,000 participants. Each conversation is recorded on a free CD to share, and is preserved at the American Folklife Center at the Library of Congress. Millions listen to our weekly broadcasts on NPR’s Morning Edition and on StoryCorps’ Listen Page.