Osama.
Immediately after the September 11, 2001 Terrorist Attacks in the United States, the United States government named bin Laden as the prime suspect. He claimed in an interview shortly after the attacks, "I was not involved in the September 11 attacks in the United States nor did I have knowledge of the attacks," and suggested the attacks were the fault of Jews or of the CIA. But in subsequent statements and interviews he expressed admiration for whoever was responsible. He took credit for "inspiring" what he calls the "blessed attacks" of September 11th in several public statements.
Per Wikipedia, He only says that the attackers were inspired by his Jihadic message. Not that he planned, funded and organized the attack.