(New York Times) – Last month’s chemical weapons attack on a rebel-held Syrian town may have caught the world’s — and President Trump’s — attention, but it was not the only recent suspected use of a nerve agent by Syrian government forces. On three other occasions in the months leading up to the attack on the town of Khan Sheikhoun, witnesses, doctors and human rights investigators say, government attacks left scores of people sickened with similar symptoms, like foaming at the mouth, shaking and paralysis — including two attacks in December, little noticed at the time, that killed at least 64 people.