Attack on Khan Sheikhoun timeline

Timeline:
April 4, at 8 a.m*., Abdullah al-Gani and Muaz al-Shami, freelance journalists who have links with radical groups located in Idlib, provided Orient News and Al-Jazeera with the video footage made by the White Helmets. The graphics show the consequences of the alleged chemical attack in Khan Sheikhoun. According to Muazz al-Shami, sarin gas was used in the attack.
http://theduran.com/lebanese-journalist-intependently-investigates-alleged-khan-sheikhoun-chemical-attack/
Yesterday, (April 4) from 11:30 am to 12:30 p.m. local time, Syrian aviation made a strike on a large terrorist ammunition depot and a concentration of military hardware in the eastern outskirts of Khan Sheikhoun town,” Russian defense ministry spokesman Igor Konoshenkov said in a statement posted on YouTube.
http://www.iraqinews.com/arab-world-news/russia-says-syria-gas-incident-caused-rebels-chemical-arsenal/
“Syrian Foreign Minister Walid Muallem explained that the first reports of the chemical attack appeared several hours before the government airstrike”
https://sputniknews.com/politics/201704091052469244-us-syria-chemical-weapons-war-pretext/

* The video footage shows clearly that the sun is high in the sky - it could not have been filmed that day.