Cable snaps on USS Eisenhower during landing
Notice the date on this video clip. This happened this year. Aircraft carriers have been using arresting cables for catching aircraft for over 80 years. They should have it down to a science. They know arresting wires are only good for so many catches before they need to be replaced (around 100, I believe). You don't want one to break like it did here. Not only is a cable break going to threaten the aircraft it is supposed to be stopping, a broken cable is going to snap back and the loose ends are going to go flying across the flight deck smashing anything they encounter.
So what happened? There was a problem with one of the shock absorbers (the Navy calls them engines) and guys who fixed it didn't get it quite right. The Virginian-Pilot has the story. Via Iaman.