Five friends from Argentina were in New York on a trip to celebrate the 30th anniversary of their graduation when they were killed in the terrorist attack that claimed eight lives.
A video has now emerged of the five friends enjoying themselves riding along the bike path where they would later die.
The footage appears to have been shot by Ariel Benvenuto, who survived the attack, and shows the friends grinning along the West Side Bike Path, next to the Hudson River.
Benvenuto was in New York with nine of his friends celebrating the 30 years since their high school graduation.
Five of the men were later killed.