Kevin Lee, a project engineer with XYZ Printing, displays 3D-printed drones during the 2016 CES trade...
Kevin Lee, a project engineer with XYZ Printing, displays 3D-printed drones during the 2016 CES trade show in Las Vegas, Nevada January 8, 2016. The drones are part of the company's STREAM (Science, Technology, Engineering, Arts and Mathematics) program that provides 3D printing educational programs to educators. REUTERS/Steve Marcus