照你这阴谋动机论的调调，没干坏事会封锁现场不马上让专家调查个水落石出还自己个清白？嚯嚯！
Syria: UN-backed watchdog says chemical weapon ‘likely used’ in February attack
https://news.un.org/en/story/2018/05/1009862
Read the @OPCW Fact-Finding Mission Report on the alleged incident in Saraqib, Syria on 4 February 2018. The report finds that chlorine, released from cylinders through mechanical impact, was likely used as a chemical weapon in the attack *****QchTNu5EhZ
— Wisconsin Project (@WisconsinProj) May 17, 2018
