'Washington acknowledged the fact of the airstrike against the Syrian troops and even apologized for the mistake.'
The Whitehouse and Samantha Power both expressed "regret" separately. That doesn't count as an apology in my book.
The aid convoy that was bombed last week that the UN Secretary General said could be a "crime against humanity" after the US propaganda machine whirred into action by blaming Russia, Syria or both through airstrikes has disappeared from the news after the Russians asked several times for the US to publish radar evidence which hasn't been forthcoming. That's because the convoy was hit from the ground by US backed terror groups. Another false flag, then.