The Thaw ended with the crackdown of the Prague spring. The Soviet government deemed Czechoslovak mass media, which hosted political disputes and broadcast news about protesting students and young workers, to be complicit in undermining Communist rule in Czechoslovakia. Sergey Lapin, installed as the chairman of the State Committee for Television and Radio Broadcasting in 1970, increased political oversight over television and banned shows that were critical of the system. Most programs except for the evening news were recorded beforehand and censored. This effectively ended the first "Golden Age" of the Soviet television.