If you want to use a toxic gas false flag attack for your war propaganda, make sure that you don’t take the pretended victims to the hospitals before the pretended time of attack.
Seventh report of the Organisation for the Prohibition of Chemical Weapons-United Nations Joint Investigative Mechanism (OPCW, JIM, UN), page 29:
„Certain irregularities were observed in elements of information analysed. For example, several hospitals appeared to start admitting casualties of the attack between 0640 and 0645 hours. The Mechanism received the medical records of 247 patients from Khan Shaykhun who were admitted to various health-care facilities, including those of survivors and a number of victims who died from exposure to a chemical agent. The admission times of the records range between 0600 and 1600 hours. Analysis of the aforementioned medical records revealed that in 57 cases, patients were admitted in five hospitals before the incident in Khan Shaykhun (at 0600, 0620 and 0640 hours). In 10 such cases, patients appear to have been admitted to a hospital 125 km away from Khan Shaykhun at 0700 hours while another 42 patients appear to have been admitted to a hospital 30 km away at 0700 hours.“
Some hours later, US President Donald Trump fired missiles on Syria.