A 17-year-old inventor in Boulder, CO, will receive a $50,000 grant to help develop a biometric sensor designed to prevent unauthorized people from firing guns. “I’ve been interested in technology for as long as I can remember,” Kai Kloepfer said.  “After the mass shooting in the movie theater in Aurora in 2012, I started thinking about the role technology could play in preventing accidents and death related to firearms. The idea actually came to me in a dream and I have been working since then to make it a reality.”