Biggest open secret is that the U.S. supplied weapons going to rebels at the Turkish border or being airdropped end up in Al-Nusra fronts backyard and into their hands.
Rebels in East Aleppo are embedded in Al-Nusra.
Al Nusra fighters have gotten treated in Israeli hospitals.
The Turkish incursion into Jarablus has been what Erdogan and the Beltway have wanted. They want a no fly zone south of the Turkish-Syrian border. Not to necessarily save IDPs/refugees but for resupplying of the various rebels.
One problem though... the SAA, Hezbollah and Russia have closed off the highway north of Aleppo. If they win in East Aleppo, then the war tide will change.