>> Northern Syria, 2014, this UN convoy is in route to a chemical weapons attack. They're about to be ambushed by militants. This never before seen video uncovered by Reuters showing one reason why investigation into Syria's chemical weapons were effectively abandoned.>>
> Use of banned toxins now common place.
The other obstacles was Damascus itself. The details hidden by officials for fear of damaging the fragile relationship between Syria's government, it's chief backers in Russia, and diplomats from the UN, and organization for prohibition of chemical weapons. Reuters Anthony Deutsch uncovered the story.>> Yeah, I talked to roughly a dozen experts, weapons inspectors, and diplomats and the picture that became clear is that there was a systematic effort to obstruct the work of the inspectors.
They were unable to explain why they still had chemicals they should not have. And one of the main questions that inspectors say they were unable to answer is what happened to 2,000 areal bombs which they had declared to the OPCW?>> Sources say president Bashar al-Assad's government tried withholding visas and coursing witness before interviews.
And in one incident it may have kept investigators waiting for over an hour. While a warehouse was secretly cleared before inspection. They also suspect Damascus may have even developed new chemical capabilities while also turning to crude barrel bombs stuffed with chlorine when their other stocks dwindled. Complicating matters government forces often would not or could not escort inspectors.
The wars multiple battle fronts creating a maze for the officials trying to reach chemical attack sites seen here.>> What they said specifically is that, there was a kind of a game of cat and mouse going on between the inspectors and the officials.>> Grid lock and indecision at the UN meant the little gains inspectors made left little mark.