Rebel army forms inside Russia

It is really true. That drone fly to Kremlin is highly possible to be sent somewhere from Russia regions. Russian's air raid defense systems are actually strong near Moscow from Ukraine side, but weak from other regions. (It's just impossible to protect all the ways or routes as their govt says.) So, there's a high chance that that was done by those rebels. Moreover, a year ago a anti-putin division had been formed from some soldiers who were outside of Russia, but decided to join Ukrainian army. They also had their own symbols here's it:

The sign says "Freedom to Russia"