They were at school blocks from ground zero on 9/11. Students reflect 20 years later (Part 1)

Hannah Moch and Ian Slade Tullis were fourth graders in Pat Carney’s class at PS 234, just blocks from ground zero, on September 11, 2001. NBC News spoke with the group one year later and for the 10th anniversary. Now as the nation marks 20 years since the terrorist attacks, they share their reflections with Rehema Ellis.