Construction Fails

It’s an 800-year-old icon with a state of the art smoke detector. How did Notre Dame catch fire? We go up and down them. Sometimes we fall down them. We don’t think about stairs until they make us. Smokestacks push our junk into the sky. But when they become junk themselves, they get blown to bits. When the earth quakes, even the biggest structures can fail. Can a building be earthquake-proof?