Princess Aiko, who is on an official visit to Laos, visited an education center on unexploded ordnance in the capital of Vientiane on Wednesday.

Between 1964 and 1973 during the Vietnam War, the U.S. military dropped more than 2 million tons of bombs in Laos to block supply routes for the National Liberation Front of South Vietnam. Work is still ongoing to remove unexploded ordnance.

At the Cope Visitor Center, Princess Aiko viewed a model showing numerous submunitions released from a cluster bomb, and listened to an explanation that a submunition can destroy an area of about 30 square meters.