Great little summary with some interesting links:
http://nowiknow.com/blame-cuba/
Quote:
The plan, devised in 1962 and code named Operation Northwoods, had a simple yet striking goal: “to place the United States in the apparent position of suffering defensible grievances from a rash and irresponsible government of Cuba and to develop an international image of a Cuban threat to peace in the Western Hemisphere.” The details, outlined in an appendix to an originally classified document titled “Pretexts to Justify U.S. Military Intervention in Cuba”