Terrorism is a tool of government to implement police state:
10 steps necessary for a Fascistic group (or government) to destroy the democratic character of a nation-state and subvert the social/political liberty previously exercised by its citizens:
1. Invoke a terrifying internal and external enemy.
2. Create secret prisons where torture takes place.
3. Develop a thug caste or paramilitary force not
answerable to citizens.
4. Set up an internal surveillance system.
5. Harass citizens' groups.
6. Engage in arbitrary detention and release.
7. Target key individuals.
8. Control the press.
9. Treat all political dissidents as traitors.
10. Suspend the rule of law.
This pattern was implemented in Nazi Germany, Fascist Italy and any country on the road to totalitarianism.
Btw. For military industrial complex who gain from this 40% of US budget this never ending war with ghost enemies. These people are living by killing humans. For them there is no problem to stage such events. 1,3 million Iraqis dead based on total lie about WMD.
Of course if you say that Putin could use this type of methods during Moscow terrorist attack everyone would consider that this is totally possible but in USA such things could never happen. Yeaaah right! You are on the path to POLICE STATE and you afraid to face the truth.