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September 27, 2016

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K.C. McGaffey, center, and John Dimmer, right, compete in the "Hacker Kombat" challenge at the WhiteHat Security booth during the Black Hat USA 2014 hacker conference at the Mandalay Bay Convention Center Aug. 6, 2014.

Steve Marcus

K.C. McGaffey, center, and John Dimmer, right, compete in the "Hacker Kombat" challenge at the WhiteHat Security booth during the Black Hat USA 2014 hacker conference at the Mandalay Bay Convention Center Aug. 6, 2014.