Internet control: Déjà vu

Several governments have recently tried to tighten control over the Internet:

• Turkey
  
• Thailand
  
• Russia
  

This is nothing new. The Kremlin tried to shut down the nascent Russian Internet -- mostly UUCP at the time -- during the 1991 coup attempt. (You can read about that here).

Nearly every government makes some attempt to control the Internet -- to preserve culture as well as political power. What are some other examples of government control over Internet content? Does the US government control Internet content?