After watching the devastation of neighborhoods after Hurricane Katrina, Barnes and Noble CEO Leonard Riggio promised to give away new homes to 100 displaced families.

A celebration last month marked the completion of the 101st and final home built through Project Home Again. (See original heartwarming video from 2009)

As a gospel choir sang "Ain't No Mountain High Enough" in front of the last newly constructed house in the hard hit neighborhood of Gentilly, 55-year-old Corliss Gaines' eyes swelled with tears.

The sight of the new home — six years after Hurricane Katrina — hits her hard.

"It's a beautiful thing, a beautiful day."

(WATCH the Making a Difference update below, or read the AP story in the SF Chronicle)