Engineers prepare to hot-fire test a 3-D printed rocket part on Test Stand 115 at NASA's Marshall Space Flight Center.
Lead test engineer Ryan Wall, right orange shirt, prepares to hot-fire test a 3-D printed rocket part on Test Stand 116 at NASA’s Marshall Space Flight Center in Huntsville, Ala. These tests are helping young engineers learn how to design, manufacture, and test rocket parts made with a new manufacturing process called 3-D printing or additive manufacturing.
Image credit: NASA/MSFC/Emmett Given