Ron Paul has been speaking about this for many years now, most prominently during the 2008 elections. It might have cost him quite some votes though, the truth hurts.
A good read on the topic is "Blowback" by Chalmers Johnson.
http://www.amazon.com/Blowback-Second-Edition-Consequences-A...
For the first known attempt on blowing up the World Trade Center: C.I.A. Officers Played Role In Sheik Visas -
https://www.nytimes.com/1993/07/22/nyregion/cia-officers-pla...
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https://www.reuters.com/article/us-usa-tradecenter-rahman-id...
"The New York Times reported the CIA had approved the visa application for Abdel-Rahman, who had supported the anti-Soviet mujahedin in Afghanistan during the 1980s."
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On blowback: https://www.amazon.com/Blowback-Consequences-American-Empire...
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The need to bomb and cause mayhem in non-white countries:
https://www.amazon.com/Search-Enemies-CIA-Story/dp/039300926...
https://en.wikipedia.org/wiki/John_Stockwell_(CIA_officer)
On the secret wars of the CIA:
https://www.c-span.org/video/?10353-1/secret-wars-cia
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On creating genocide in Indonesia to overthrow the government:
https://en.wikipedia.org/wiki/The_Jakarta_Method
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The "Secret War" in Laos where the CIA waged war and more bombs were dropped than in WWII.
"U.S. aircraft dropped more ordnance on Laos than on all countries during World War II, leaving Laos with about 78 million pieces of unexploded ordnance (UXO) by the end of the war.[101] Casualties continue to mount from UXO dropped by the U.S. and Laotian Air Forces from 1964 to 1973. It has been reported that, between 1964 and 1973, areas controlled by the invading North Vietnamese and Pathet Lao were hit by an average of one B‑52 bomb-load every eight minutes, 24 hours a day. Xiangkhouang Province was the most heavily bombed province. Thirty percent of bombs failed to explode immediately."