A news report about the USS Iowa gun turret explosion in 1989.
Israel Tests New Unmanned Burrowing Vehicle
The Afeka College of Engineering in Israel is developing an Unmanned Autonomous Burrowing Vehicle that can be used as a burrowing missile or bomb when it reaches a target. It can also be used to take out surface targets or underground fortified bunkers/bases if a diamond cutter is utilized. This is currently only a prototype for proof of concept and is in the initial testing phase.