The 9/11 Memorial & Museum on Tuesday officially added a portrait previously thought to be long-lost to its “In Memoriam” exhibition, which contains nearly 3,000 images depicting the people who died in the 2001 World Trade Center terrorist attack.

Albert Ogletree, who worked at Forte Foods in the Cantor Fitzgerald cafeteria in the North Tower, died on 9/11. He was 49.

According to the museum, Ogletree’s portrait had eluded the exhibit for decades until it was recently discovered in a 1966 high school yearbook from Romulus Community Schools in Michigan, thanks to Grant Rodríguez Llera, a museum visitor services staffer.

Only one portrait remains missing from the exhibit now that Ogletree’s has been added.