United Nations investigators encountered evidence that alleged chemical weapons attacks by the Syrian military were staged by jihadist rebels and their supporters, but still decided to blame the government for two incidents in which chlorine was allegedly dispersed via improvised explosives dropped by helicopters.
In both cases, the Syrian government denied that it had any aircraft in the areas at the times of the purported attacks, but the U.N. team rejected that explanation with the curious argument that Syria failed to provide flight records to corroborate the absence of any flights. Yet, if there had been no flights, there would be no flight records.