Dog led blind owner down 78 storeys during 9/11 attack

A guide dog named Roselle led her blind owner Michael Hingson down 78 storeys of the World Trade Centre's North Tower during the 9/11 attack. The Labrador then guided Hingson to a friend's home. The attack, which killed nearly 3,000 people, was carried out by 19 militants associated with militant group al-Qaeda on this day 17 years ago.