These are the actual documents from the The National Security Archive - I have added the red. (Searchable text version of Operation Northwoods.)

Possible similarities with 9/11 to look for:

1) Creating a justification for invasion of a country.
2) The search and destruction of WMD's (missiles).
3) Overthrow of a Dictatorship.
4) Willingness to harm American citizens.
5) Repainting aircraft to appear as a civilian airliner.
6) Drone aircraft.
7) Swapping of aircraft.
8) Carefully selected passenger list.
9) Evacuation of passengers at a remote runway.
10) Detonating an aircraft remotely.
11) Planting of aircraft parts.
12) Conducting funerals for mock-victims.
13) Deceiving members of our own military.
14) Using air defense exercises as a cover.
15) A series of well-coordinated incidents.
16) Giving the appearance of being done by hostile forces.
17) Manipulating the media to create national indignation.
18) An attack in Washington.
19) Using plastic explosives in carefully chosen spots.
20) Hijacking.
21) CIA involvement.
22) False identity for the pilot.
23) The State Department also promoting justification for invasion.