. >> we have every reason to think it was a provokecation, a smart one of course but the technique is very simple. they use an old soviet missile which are no longer in service with the syrian army. but it carried the label made in the u.s.s.r. >> he said the u.n. report was rushed and ignored other evidence of the attacks. >> this material which was collected by the syrian authorities was discreetly handed over to the head of u.n. mission here, mission of experts, which came and investigated the incident but never did so on the three subsequent incidents, and then sundstrom was asked to look into it and eventually factor these -- this new evidence into the final report of his mission. it never happened, in fact. >> still, the u.s. is pushing for a response based on this u.n. investigation. just last week, the u.s. and russia agreed to a plan to rid syria of its chemical weapons. damascus pledged to move forward and has so far complied the >> the chemical weapons employed, if you like, by the -- -- ploy, if you like, by the u.s. and rebels was countered effectively by assad and them s