A STORY WITH SO MANY LAYERS... REACHING SO MANY OF YOU FOR DIFFERENT REASONS.
JACK HANNA AND THE COLUMBUS ZOO WERE A POWERFUL TEAM FOR 42 YEARS BEFORE HE RETIRED IN 20-20.
HIS PASSION FOR WILDLIFE CONSERVATION AND EDUCATION - UNMATCHED.
A YEAR LATER THE FAMILY ANNOUNCED HE HAD ALZHEIMER'S DISEASE AND THEY'VE BEEN INTENSELY PRIVATE - UNTIL NOW.
HERE'S TERRI SULLIVAN.