A Los Angeles-based team has unveiled the first comprehensive list of the more than 120,000 people of Japanese descent who were held in internment facilities across the United States during World War II.

Some 200 people, including former internees, took part in a ceremony Saturday to commemorate the exhibition of the full list at the Japanese American National Museum.

Duncan Ryuken Williams, a professor at the University of Southern California, led the project to complete the list as this year marks the 80th anniversary of U.S. President Franklin Roosevelt signing the executive order that authorized internment about two months after Japan's attack on Pearl Harbor.