What is a "False-Flag" [Terrorist Attack]?
"False flag terrorism" is defined as a government attacking its own people, then blaming others in order to justify going to war against the people it blames. Or as Wikipedia defines it:
False flag operations are covert operations conducted by governments, corporations, or other organizations, which are designed to appear as if they are being carried out by other entities. The name is derived from the military concept of flying false colors; that is, flying the flag of a country other than one's own. False flag operations are not limited to war and counter-insurgency operations, and have been used in peace-time; for example, during Italy's strategy of tension.
The term comes from the old days of wooden ships, when one ship would hang the flag of its enemy before attacking another ship in its own navy. Because the enemy's flag, instead of the flag of the real country of the attacking ship, was hung, it was called a "false flag" attack. There are many examples of false flag attacks through history.