Students from across Southern California compete in NASA Jet Propulsion Laboratory's annual Invention Challenge in Pasadena, Calif. This year's challenge called "Ton of Bricks," invited students and JPLers to build the most efficient cardboard bridge, in order to get kids excited about math and engineering. To learn more about JPL, visit http://www.jpl.nasa.gov. On the go? Check out our newly optimized mobile site from your smartphone.

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