U.S. President Barack Obama (R) speaks with Thippasone Soukhathammavong, director of UXO Lao, as he visits the Cooperative Orthotic and Prosthetic Enterprise (COPE) for victims of amputations due to accidents with the many rounds of unexploded ordnance remaining in the Laotian countryside following the Vietnam War era, on the sidelines of the ASEAN Summit, in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





Prosthetic legs form a museum installation as U.S. President Barack Obama visits the Cooperative Orthotic and Prosthetic Enterprise (COPE) for victims of amputations due to accidents with the many rounds of unexploded ordnance remaining in the Laotian countryside following the Vietnam War era, on the sidelines of the ASEAN Summit, in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama is greeted with flowers as he arrives at Luang Prabang airport for a cultural visit alongside his participation in the ASEAN Summit, in Luang Prabang, Laos, September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama greets local residents on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama greets local residents on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama greets local residents on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama greets novice monks at the Wat Xieng Thong Buddhist temple, alongside his participation in the ASEAN Summit, in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama visits the Wat Xieng Thong Buddhist temple, alongside his participation in the ASEAN Summit, in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





A Secret Service agent keeps watch as U.S. President Barack Obama buys a fresh-cut coconut on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





People try to catch a glimpse of U.S. President Barack Obama as he walks in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





People get a look at U.S. President Barack Obama's traveling media and entourage as he walks in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama greets people as he departs after a town hall-style meeting with a group of Young Southeast Asian Leaders Initiative (YSEALI) attendees, alongside his participation in the ASEAN Summit, at Souphanouvong University in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





A Secret Service agent keeps watch as U.S. President Barack Obama drinks water of a fresh-cut coconut on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama drinks water of a fresh-cut coconut on a walk in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama drinks from a fresh coconut along the banks of the Mekong River in the Luang Prabang, Laos, Wednesday, September 7, 2016. (Photo by Carolyn Kaster/AP Photo)





U.S. President Barack Obama visits the Wat Xieng Thong Buddhist temple, alongside his participation in the ASEAN Summit, in Luang Prabang, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama smiles as he chats with Vietnam's Prime Minister Nguyen Xuan Phuc during the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





Cambodia's Prime Minister Hun Sen takes a picture of Russia's Prime Minister Dmitry Medvedev at the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama takes his seat for the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





Philippine President Rodrigo Duterte watches as wine is poured at the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





China's Premier Li Keqiang, Cambodia's Prime Minister Hun Sen, Russia's Prime Minister Dmitry Medvedev and Philippine President Rodrigo Duterte raise their glasses at the opening toast of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





U.S. President Barack Obama poses during a family photo during the ASEAN Summit in Vientiane, Laos September 7, 2016. (Photo by Jorge Silva/Reuters)





Dancers perform at the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





Dancers perform at the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





Laos Prime Minister Thongloun Sisoulith shares a toast with U.S. President Barack Obama and other world leaders at the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)





A woman in a USA sash, who would help show U.S. President Barack Obama to his seat, waits with other women in traditional dress for the start of the ASEAN Summit gala dinner in Vientiane, Laos September 7, 2016. (Photo by Jonathan Ernst/Reuters)