A private school in Miami is offering parents a $120 bulletproof plate to fit inside their child's backpack. The flexible panel can stop most handgun bullets and weighs only 1 pound, says chief of security George Gulla of Florida Christian School. "I'd rather be prepared for the worst than be stuck after saying, 'Wow, I wish we would’ve done that,'" Gulla explained. "We want to protect our students' center mass."