No matter how high-tech our aircraft become, every flight should begin with a pre-flight inspection to make sure all the FAA-approved parts are attached to the airframe. This pre-flight ritual usually includes running your fingers along the wing's leading edge to flick off the dead bugs and then wiggling various things at the wing's trailing edge. Unseen is the straight-line distance across a wing from leading edge to trailing edge. This line is known as the wing's (_____).
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