world fastest-growing humanitarian crisis show sign abate two months militant attack trigger military crackdown myanmar rakhine state week thousands new rohingya muslim refugees cross border neighbor bangladesh flee hunger campaign attack myanmar security force buddhist mob unite nations call ethnic cleanse exhaust hungry destitute join 600,000 early flee military call clearance operations rohingya villages aug. 25 attack rohingya militants cross land border rivers treacherous seas seek refuge crowd camp bangladesh poor country struggle along international aid agencies cope influx multimedia essay use combination reuters graphics picture video show crisis unfold exodus rohingya live refugees bangladesh see graphic `` desperate escape `` tmsnrt.rs/2xivxqf myanmar 's rohingya exodus desperate escape