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Now Playing: 07-20-12 Marketplace Tech Report

This week, Google held a conference -- not about the latest features in Google+, or better ways to use your Android phone, but about ways to stop really bad guys. Think drug cartels, organ harvesters, and arms dealers; bad, bad guys. It hopes its technology can make our crime fighters more efficient. Plus, researchers have developed an electronic glove that can teach you to play the piano.