How NASA is Making Rockets By Welding Metal Powder with Lasers

Normally, rockets are made of a whole bunch of small parts that are intricately attached to each other to form the body that can actually fly into space. If you could build complex geometrical parts out of a single piece of material, however, things would get much easier. That's where metal powder and lasers come in. » 11/10/12 5:00pm 11/10/12 5:00pm