A Hindenburg Passenger Ticket, Possibly the Only One to Still Exist, Goes On View at The Smithsonian National Postal Museum. Dolan’s passport helped identify his body after the crash. Courtesy of the Dolan family archives

A Hindenburg Passenger Ticket, Possibly the Only One to Still Exist, Goes On View at The Smithsonian National Postal Museum. Dolan’s passport helped identify his body after the crash. Courtesy of the Dolan family archives