I'm sure by now you must have heard about the bridge collapse in Minneapolis. A friend of mine (actually, two of them) was near the scene when it happened. He took a bunch of pictures, which can be seen here.
As my co-worker Raf was saying earlier today, everything will fail some day. That metal grate you're walking over on the sidewalk? It could fail at any moment, causing you to fall 15 feet to the concrete below. Everything has a point of failure. As safe and secure as we feel, everything around us is being held together by a very thin thread.