Some 60 people have already been banned from the parade route Friday and both uniformed and undercover officers will be in the crowds or on rooftops.
On another, her gang members beat an undercover officer unconscious, dumping him in the countryside.
Meanwhile, in Singapore undercover officers seized several tiger skins that had been advertised for sale online.
In a triumph of covert police work, undercover officers in North Carolina arrested another undercover officer from a different force after buying drugs off him.