It took ten years for Bert Upson to come to grips with the terror of his incredible escape from the 78th floor of the South Tower on 9/11 to be able to write about it. His book, "On A Clear Day - 9/11 An Eyewitness Account", describes in intimate detail his shock and awe in the midst of life threatening events under unbearable time compression with only seconds to decide between life and certain death. Bert leads the reader through the essentials of the obliteration of the towers and his escape from the lock down in New York and near mugging in the dark as he ran for the last subway out of Lower Manhattan with no place to hide. Bert is a former advertising executive on Madison Avenue with the distinction of winning two Clios and election to the Packaging Hall of Fame.