This picture taken on May 28, 2016 shows bomblets from a cluster bomb hanging at the Visitor Centre of COPE, a Laos charity working with the Ministry of Health specialising in limbs for amputees, in Vientiane. 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 / ALISON MCCAULEY / TO GO WITH AFP STORY LAOS-US-DIPLOMACY-CONFLICT-OBAMA,FOCUS BY CORALINE MOLINIEALISON MCCAULEY/AFP/Getty Images