US President Barack Obama tours the Cooperative Orthotic and Prosthetic Enterprise (COPE) visitor center in Vientiane on September 7, 2016. Obama became the first US president to visit Laos in office, touching down in Vientiane late on September 5 for a summit of East and South East Asian leaders. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)