Sawyer will meet with nearly 40 families who lost husbands and fathers in the attacks.
Now, in a special edition of ABC News'20/20, she’ll revisit those families.
As those children approach their 20th birthdays, the special edition of20/20will bring nearly 40 families together again.

Diane Sawyer with the families featured in the ‘20/20’ Sept. 11 special.ABC
“Has grief given them new purpose?
Are some following in their fathers' footsteps?”
the official synopsis reads.
“A master class in resilience and hope comes from a group forever bonded by a national tragedy.
The special edition of20/20will air Friday, Sept. 10, at 10 p.m. ET/PT on ABC.