Two Syrian doctors and a nurse tell AFP that Bashar al-Assad's government coerced them into providing false testimony to international investigators after a deadly chlorine attack. The three, who treated the wounded at a field hospital in the rebel-held town of Douma near Damascus after the April 7, 2018 attack, said they were summoned to national security headquarters. "When we entered the investigator's room.. his gun was on the table pointing towards me," says one emergency specialist, giving public testimony which would have been impossible before the fall of Assad's government on December 8. IMAGES AND SOUNDBITES