all the best to both of you. thank you for being here. >> thanks so much. >> the federal emergency management team tries to learn from each disaster it handles. it sent camera crews into ground zero in the days after 9/11. the video was just released last week and we will take you through it, just ahead. >> also, preparing for a rush of casualties that never came in on 9/11. our next guest remembers working at a hospital, ready to aid the emergency responders who went into the twin towers but never came out. her powerful story from that day, upcoming. >> it was a war zone. this is all of the trade towers left on the ground. i couldn't concei this as a heart attack.