USEFUL BACTERIA

They fill up holes in concrete, rid the human body of diseases, and remove land mines. Scientists have tamed an army of bacteria and taught the well-trained microslaves how to do things that no human hand would ever be able to handle.

Could we reprogram bacteria to be not just our allies against disease, but actual weapons? If that works, what else could we make germs do?

Cracks in concrete could be a thing of the past, if tiny bacterium capsules are mixed into the material.