Operation Gladio was a CIA program in effect from 1946 to 1990. It placed commandos in every European nation, who would carry out actual terror bombings and place blame on leftists. The biggest action was the 1980 train station bombing in Bologna, Italy.
80 women, children and infants were blown to bits and 250 wounded. It was discovered by the Italian government, it was the work of Gladio commandos, operating on orders from the CIA, who carried it out.
It is unknown how many terror bombings and murders were done in Europe between 1945-1990 by Operation Gladio operatives, but some place the number at 3500.
Still think 9-11 could not be a joint CIA- DOD- Mossad false flag. You are not aware of the history of these groups.