According to War History Online, the only remaining derelict section of a German Horten Ho 229 flying wing has been completely refurbished at the Steven F. Udvar-Hazy Center, a part of the US Air & Space Museum, and will likely go on display for the world to see in the not-too-distant future. The Ho 229 was an advanced secret aircraft developed by the Horten Brothers for the Luftwaffe that wedded jet technology with the world’s first stealthy design. It was largely intended to be used against rampaging allied bombers in an effort to defend the Reich from further bombing raids.
For more information on the restoration, click on the following link: https://www.warhistoryonline.com/military-vehicle-news/the-horten-229-v3-flying-wing-amazing-image-collection.html