A 13,000-square-foot addition at the Walker Valley High School in Charleston, Tenn., has been built -- and is covered in reinforced concrete. The addition of the concrete is expected to make the building more resilient during tornadoes, and adding it also meant the Federal Emergency Management Agency would contribute to the structure's cost. "The entire outside is reinforced concrete ... So it's basically built like a bunker," said Cason Conn, a senior project manager at Tri-Con, the project's contractor.
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