A mother and father grieve at the spot where their son and his friend were killed a week before. They were playing with cluster bomblets, one of which can be seen in the foreground. Decades on, Laos is still living with the effects of the Vietnam war. Millions of bombs were dropped by US aircraft in Laos in an attempt to destroy the supply lines of North Vietnamese forces. Many remain deadly, with frequent accidents involving unexploded ordnance (UXO).