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Nov 30, 2022
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![A 3D rendering of grain bins following an August 2020 windstorm. The rendering was produced with the aid of lidar — near-infrared laser beams fired at the structures by a drone flying above the site.](https://engineering.unl.edu/images/news/headline_images/Hero-%28PS%29_13.jpg)
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After a 2020 derecho hit east-central Iowa, Nebraska's Christine Wittich, assistant professor of civil and environmental engineering, conducted "structural reconnaissance" on a unique case study to learn why four of an interconnected group of five grain bins were destroyed and one was left totally intact.
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