This picture taken on June 2, 2016 shows Yhong Vueyha being measured for a prosthetic arm by a COPE (Cooperative Orthotic and Prosthetic Enterprise) employee at a mobile clinic in Xieng Khoang. The legacy of the secret bombing campaign the United States conducted in a sideshow to the Vietnam War and its enduring consequences will feature prominently during a visit September 2016 by Barack Obama, the first ever by a US president to Laos. During the trip he is expected to announce the ramping up of a US programme to clear unexploded devices, echoing similar moves Washington took in Vietnam as relations between the two former foes blossomed. / AFP PHOTO / CAROLINE MOLINIE / TO GO WITH AFP STORY LAOS-US-DIPLOMACY-CONFLICT-OBAMA,FOCUS BY CORALINE MOLINIECAROLINE MOLINIE/AFP/Getty Images