No no no no, according to the Russians, the RQ-9 was violating international airpsace, when it suddenly performed evasive moves without any provocation, then crashed into the sea due to operator incompetence. The SU-27s were just there to see if the enemy drone was lost, or if it just needed a hug, a Kleenex, a band-aid or something. The vapor seen in the video was from their onboard juice box dispensers, being deployed to attempt to entice the drone to safety. The only real question that remains unanswered - was it grape or lime flavored?
OK sacastic mode switching off now.