The US Marines have started 3D printing explosives

The future of sophisticated, tech-driven warfare might be here sooner than we think. A division of the U.S. marines has officially begun to 3D print and test small explosives, a US Defense Department blog reported yesterday. While only in its initial prototyping phase, the results have been overwhelmingly successful so far, meaning it might not be long before 3D printing technology revolutionizes the way we design and manufacture explosives.

from 3ders.org - http://www.3ders.org