This story contains graphic imagery.
(CNN)Survivors of a deadly airstrike in Syria have described chemical bombs being dropped from planes, in accounts that directly contradicted the Assad regime's version of a dawn attack that drew condemnation around the world.
- Chemical weapons expert: Russia's explanation of events is "highly implausible."
- US President Donald Trump said the attack changed his views on Syria and Assad.
- Medical experts said the attack was likely the result of a nerve agent, such as sarin gas.
- The UN Security Council held an emergency meeting but didn't vote on a resolution.