Doomsday Preppers Dome of Doom Doomsday Preppers Site David Nash gets help building a survival dome. Info Next Airing: TUE MAR 17 4AM ET 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 2 comments   Get Livefyre FAQ Sign in + Follow Post comment Link Newest | Oldest Richard Teague 5pts It would be better to sew up a canvas or vinyl tent cover for the frame and make it portable. Portability would be much more desirable in an emergency situation. Paul Berry 5pts The biggest danger to these guys is obesity.