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I’ve spent a lot of time Columbia auto windshield looking at cracked glass under bright shop lights. Some breaks tell a clear story: a pea of gravel starbursting on the highway, a branch snapping in a storm. Stress cracks are quieter. They creep from the edge, split a straight path, and appear without a clear hit. In Columbia, where afternoons swing from humid heat to a sudden thunderstorm, I see them weekly. They unse