With the terror of school shootings lurking in the minds of parents and students, a booming industry is taking aim at parents: bulletproof backpacks are being marketed as a way to keep kids safe. Pei-Sze Cheng and the I-Team put one of the top models to the test. Read more: 4.nbcny.com/9sAd0of NBC 4 New York on Twitter: 4.nbcny.com/kAuuwUN NBC 4 New York on Facebook: 4.nbcny.com/mbeh714 NBC 4 New York on Instagram: 4.nbcny.com/g5YlkcI NBC 4 New York on Youtube: 4.nbcny.com/iTUpy5e #SchoolSafety #ITeam #NYC