From USA Today:
Crystal Sanchez, a University of California, Irvine student, recently won $25,000 at the Network for Teaching Entrepreneurship (NFTE) National Youth Entrepreneurship Challenge for designing a necklace to help prevent sexual assaults. Clicking a button on the Guardian Locket will notify the top emergency contacts in someone’s phone of a potential attack.

For the full story, please visit http://college.usatoday.com/2015/10/23/25000-dollar-invention-ideas/.