Aviation disasters like TWA Flight 800, the Kegworth crash, and Japan Airlines Flight 123 show how thin the line is between safety and catastrophe.

Bridge collapses have etched hard lessons into the history of engineering. Tacoma, Minneapolis, Genoa -- symbols of innovation that have become stark reminders of what happens when flaws go unchecked.

When dams break, devastation follows. Derna, Malpasset, Brumadinho -- three disasters that turned engineering failures into mass tragedies.