It looks like a drawing produced by a child using an etch-a-sketch. But this scrawl appearing over a map of the U.S. is in fact the flight path taken by Boeing's 787 Dreamliner during a test-flight.

EVERETT – Boeing Co. designers and marketers are betting that a lot of subtle changes in the interior of their new 787 jetliner will add up to strong passenger demand to fly on the plane. Boeing ...