FILE PHOTO: Myanmar's President Win Myint arrives at Tribhuvan International Airport to attend the Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC) summit in Kathmandu, Nepal August 28, 2018. REUTERS/Navesh ChitrakarYANGON (Reuters) - Myanmar will release 6,520 prisoners in an amnesty on Tuesday, the president’s office said in a statement. President Win…