Examine the forces that act on an airplane in flight, the motions a pilot controls, and the design process engineers use to develop airplanes that manage these flight conditions, in this interactive produced by WGBH and The Documentary Group. The first part of the interactive uses videos, still images, and diagrams to explain the four forces of flight (lift, thrust, drag, and weight) and the three motions an airplane experiences in flight (roll, pitch, and yaw). The second part explores the four primary steps of the design process and the tools today’s aerospace engineers use in their work.