Men inspect the wreckage of a Russian helicopter that had been shot down in the north of Syria's rebel-held Idlib province, Syria August 1, 2016. REUTERS/Ammar Abdullah

Men inspect the wreckage of a Russian helicopter that had been shot down in the north of Syria’s rebel-held Idlib province, Syria August 1, 2016. REUTERS/Ammar Abdullah

Men inspect the wreckage of a Russian helicopter that had been shot down in the north of Syria's rebel-held Idlib province, Syria August 1, 2016. REUTERS/Ammar Abdullah

August 1, 2016 10:53 AM (UTC+8)