Mexican teen's sound-wave fire extinguisher wins gold in Indonesia

Ángela Karime Venegas Hernández, a 17-year-old student from Mexico, won a gold medal at an international invention fair in Indonesia for Vortex Tech, a fire extinguisher that uses low-frequency sound waves to put out flames. Building on earlier experiments and helped by her uncle, she developed several prototypes before succeeding, and hopes to study engineering.