This weekend will mark the 20th anniversary of 9/11. 

Most of us remember where we were that fateful day, watching those horrific images coming out of New York and Washington DC. 

It changed the world forever, and the challenge is how to make sure future generations don't forget the lessons learned from 9/11. 

Director of tourism at 9/11 memorial and museum in New York Isaac Pacheco joined Kate Hawkesby. 

LISTEN ABOVE