Survivor of 9/11 details 'miraculous' thing he saw before buildings collapsed

Michael Hingson, a blind man who survived the terrorist attacks on the U.S. on Sept. 11, 2001, details his experience moving down the stairs 78 floors with other people.

Michael Hingson, a blind man who survived the terrorist attacks on the U.S. on Sept. 11, 2001, details his experience moving down the stairs 78 floors with other people including his colleague David and people who were visiting his sales office for seminars that day.