FILE - In this July 17, 2014 file photo, Guyana's President Donald Ramotar arrives for an official group photo during the China and CELAC Summit at the Itamaraty Palace, in Brasilia, Brazil. On Tuesday, Sept. 22, 2015, Ramotar accused Venezuela of deploying troops to a contested border region in what he called a “dangerous” escalation of a long-running dispute between the two South American nations. (AP Photo/Felipe Dana, File)