The Romulans have landed

Invisibility cloaks that are able to steer light around two dimensional objects have become reality in the last few years. But the first real-world application of the theories that made them possible could be in hiding vulnerable coastlines and offshore platforms from destructive tsunamis.

The first working invisibility cloak, built in 2006, guided microwaves around a small, flat copper ring as if it wasn't there. By October 2007, a device repeated the trick for harder-to-handle visible light, and some progress is reported on the yet more complex task of making cloaks to hide 3D objects.

Now Stefan Enoch at the Fresnel Institute in Marseille, France, says that established cloaking principles could be applied to ocean waves, which are essentially two-dimensional. Such techniques could be used to render vulnerable coastlines or offshore platforms invisible to damaging waves, he says.

This link will take you to an article about the first cloaking device.