Yesterday we posted about Boston College professor Elizabeth Stringer Keefe, who has been attempting to return the above wedding photo, found in the rubble at Ground Zero after the 9/11 attacks, for the last thirteen years. And the story has a happy ending: Keefe finally found the owner!

Here's the happy ending in 140 characters: @gramercy17 alerted @FredWMahe about a post on @Gothamist. Fred connected w me via @LinkedIn. — E. Stringer Keefe (@ProfKeefe) September 13, 2014

On Thursday, Keefe posted this message on Twitter: "Every year on #911 I post this photo hoping 2 return 2 owner. Found at #groundzero #WTC in 2001. Pls RT."

Every yr on #911 I post this photo hoping 2 return 2 owner. Found @ #groundzero #WTC in 2001 -Pls RT pic.twitter.com/mZ9LdQqE7x @universalhub — E. Stringer Keefe (@ProfKeefe) September 12, 2014

The photo's owner Fred Mahe, who last saw it at his desk on the 77th floor of the second World Trade Center on 9/11, saw Gothamist's post and sent Keefe a message on LinkedIn. Mahe is the man in the photo on the back left, facing the camera. You can see how it played out on Twitter below.

@ProfKeefe I KNOW THE PEOPLE IN THE PICTURE! I was at the wedding. — Fred Mahe (@FredWMahe) September 12, 2014

Attention wonderful world: ALL SIX PEOPLE ARE ALIVE AND WELL AND I HAVE JUST SPOKEN TO ONE OF THEM!!!!!!!!!!! #Happyending #911photo — E. Stringer Keefe (@ProfKeefe) September 12, 2014

@ProfKeefe 9/11 we remember what we lost. 9/12 we remember what we have. 9/12/01, I saw the best of humanity. Elizabeth is 100% 9/12 #9/12 — Fred Mahe (@FredWMahe) September 13, 2014

Keefe and Mahe talked on the phone last night. "It was an overwhelming conversation," Keefe told the Boston Globe. She learned that the wedding had taken place in Aspen, and the bride and groom, Christine and Christian Loredo, were college friends of his who now live in California.

"The story is Elizabeth, the story is persistence and trying to help someone she didn't even know," Mahe told ABC. He also contacted the Loredos to tell them about the photo; Christine called it a "great memento of resilience."

@ProfKeefe thanks so much for this amazing story, re: our wedding photo! Our hearts go out to all who lost friends & family in #911. Thx 😊 — Christian Loredo (@CML) September 13, 2014

"It definitely brought tears to my eyes," she told ABC. "I think it's nice to know that people out there care so much for strangers," Loredo said. "It gives me confidence in humanity."