The world's largest unmanned systems exhibition wrapped up last week in Washington, D.C. It featured a treasure trove of information for investors, including the latest in drone and robotics technology. Motley Fool analysts Blake Bos and Rex Moore were among the 8,000 attendees; in this video talk about the role of additive manufacturing -- or 3-D printing -- in the drone industry.

See the entire video report here.

Blake Bos has no position in any stocks mentioned. Rex Moore has no position in any stocks mentioned. The Motley Fool recommends 3D Systems, ExOne, and Stratasys. The Motley Fool owns shares of 3D Systems, ExOne, General Electric Company, and Stratasys and has the following options: short January 2014 $36 calls on 3D Systems and short January 2014 $20 puts on 3D Systems. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.