moscow u.s. position syria remain mystery moscow washington rhetoric tend primitive loutish russian news agencies quote deputy foreign minister sergei ryabkov say wednesday ryabkov remark release minutes u.s. secretary state rex tillerson high level representative trump administration visit russia due start talk russian counterpart assad use chemical weapons reut.rs/2o5fmev worry lessons syria chemical attack reut.rs/2o6r55r ryabkov say talk russia expect discuss no-fly zone syria north korea ukraine would also agenda whole administration stance regard syria remain mystery inconsistency come mind first ria news agency quote rybakov tell reporters general primitiveness loutishness characteristic current rhetoric come washington hope become substance american policy ria quote ryabkov say russian diplomat say u.s. stance syria mystery agencies