One of the more iconic photos of the Prague Spring is this:
A high Res version is on wikimedia, who took it first from a CIA flicker post. It is labeled there as "1968. During the Soviet invasion of Czechoslovakia, Czechoslovaks carry their national flag past a burning Soviet tank in Prague."
After reformation attempts in Czechoslovakia spearheaded by the KPČ under Dubček to attempt a "socialismus s lidskou tváří" (Socialism with human face), the Warsaw Pact troops marched in on 21st of August 1968 after pressure by DDR, PRL, HPR and PRB on the USSR. The troops in action were coming from the Soviet Union, Poland, Hungary and Bulgaria, DDR troops stood in waiting at the border but never crossed.
Most of these armies were armed with several tank models designed in Russia, though sometimes modified.
I have trouble identifying the two armored vehicles - the one in the background left with the text on the side and the burning one on the right.
Which model of (supposedly Russian) tank is this?