hEADS uP: An engineer flies a quadcopter high over the 3D Robotics factory in Tijuana [1], which bustles with new, high-tech manufacturing. "Mexico is the new China," observes Chris Anderson [2], seen here outside the company's office in Berkeley, Calif. Not far away, on a landfill near San Francisco Bay [3], a flight tester launches a model under consideration as the company's fixed-wing platform. Also in Berkeley, a particularly muscular "hex" copter struts its stuff [4]. Some design work can be done onscreen [5]. Company cofounder Jordi Muñoz [6] plays with a quad indoors. Kids, don't try this at home. 2 4 5