From Wikipedia:

Operation Northwoods, or Northwoods, was a false-flag plan that originated within the United States government in 1962. The plan called for Central Intelligence Agency (CIA) or other operatives to commit genuine acts of terrorism in U.S. cities and elsewhere. These acts of terrorism were to be blamed on Cuba in order to create public support for a war against that nation, which had recently become communist under Fidel Castro. One part of the Operation Northwoods plan was to "develop a Communist Cuban terror campaign in the Miami area, in other Florida cities and even in Washington."

 

Operation Northwoods is especially notable in that it included proposals for hijackings and bombings followed by the introduction of phony evidence that would implicate a foreign government.

 

The plan stated:

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From What Really Happened

Code named Operation Northwoods, the plan, which had the written approval of the Chairman and every member of the Joint Chiefs of Staff, called for innocent people to be shot on American streets; for boats carrying refugees fleeing Cuba to be sunk on the high seas; for a wave of violent terrorism to be launched in Washington, D.C., Miami, and elsewhere. People would be framed for bombings they did not commit; planes would be hijacked. Using phony evidence, all of it would be blamed on Castro, thus giving Lemnitzer and his cabal the excuse, as well as the public and international backing, they needed to launch their war.

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From ABC News, May 1, 2001:

 

In the early 1960s, America's top military leaders reportedly drafted plans to kill innocent people and commit acts of terrorism in U.S. cities to create public support for a war against Cuba.

More information on Google

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