Answer:
Increased surveillance: In order to control terrorist activities, the US government increased surveillance in various public places, such as airports, courthouses, and malls. This surveillance was effective against tracking illegal activities, but was also a violation of citizens’ privacy. Also, security checks at various public places were made mandatory as a precautionary measure. The searches of citizens’ persons and property were thorough and detailed, and practically violated the Fourth Amendment, which states that a search cannot be carried out in the absence of probable cause.
Explanation: