March 29, 2013 8:44 am Teen Builds Hi-Tech “Helping Hand” A Pennsylvania teenager’s prize-winning science fair experiment could end up changing lives. His “Helping Hand” is a voice-controlled robotic grasper that only responds to its assigned user. US & World Videos 3:29 Watch: Why the pay gap for women in tech hasn't budged 0:55 SF-based app tracks alcohol consumption 2:10 FCC votes to restore net neutrality 4:09 Watch: Students using AI service to write school papers 2:29 California lawmakers clear path for more oversight, traffic tickets for driverless cars
