Doomsday Preppers Dome of Doom Doomsday Preppers Site David Nash gets help building a survival dome. Info Check your local listings. Doomsday Preppers: Dome of Doom David Nash gets help building a survival dome. Share Share this URL: Or you can use the code below to embed the video. The code updates if you change the width/height. Minimum dimensions are 320x211 pixels. <iframe width="640" height="391" src="http://channel.nationalgeographic.com/channel/doomsday-preppers/videos/dome-of-doom/embed/" frameborder="0" scrolling="no" allowfullscreen></iframe> Width: px Height: px 1 comments   Get Livefyre FAQ Sign in + Follow Post comment Link Newest | Oldest Paul Berry 5pts The biggest danger to these guys is obesity.