** COMMERCIAL IMAGE ** In this photo taken by AP Images for Dyson, from left, Sir Miles Davis Academy students Brianna Brown, Tekayla Timms and Lauryn Hill participate in an invention school workshop led by James Dyson, second right, as the James Dyson Foundation begins its mission to encourage more American students to become future engineers and inventors Thursday May 5, 2011, in Chicago. Also pictured at right is mentor Leah Kenttamaa-Squires. (Peter Barreras/AP Images for Dyson)

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