Ghassan Abdallah al-Sharbi says a religious figure in Saudi Arabia used the term "your highness" during a telephone conversation with a man — just before urging al-Sharbi to return to the U.S. and take part in a plot against the U.S. that would involve learning to fly a plane.
The Sept. 11 commission found no evidence to indicate the Saudi government as an institution or Saudi senior officials individually had supported the attacks.
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