The agreement says that Syria provides the Russian military aviation the possibility of being at the Khmeimim airbase on a permanent and free basis.
Against this background, the discussion continues on the issue of responsibility of Turkey for the Russian bomber Su-24 shot down in November last year. Ex-deputy of the Bundestag and ex-deputy chairman of the PACE Willie Wimmer in his interview to the news agency "Sputnik" He expressed the opinion that Turkish military aircraft struck the Russian bomber with the help of other “partners”. In particular, we can talk about aircraft of the USAF and Saudi Arabia.
From an interview with Wimmer:
According to my information, one American and one Saudi AWACS aircraft participated in this. Such a plane as this Russian bomber, just do not shoot down: you must send a fighter to the target. This can only airplanes ARLO. The American board started in Cyprus, another flew from a base in Saudi Arabia. What happened there does not correspond to generally accepted international rules. They shot down a Russian plane because they wanted to shoot it down.
Again, this is a statement the former western official. As soon as individual officials receive the prefix "ex", they can afford to express sound thoughts. As acting officials do not always work.