Sentence:  The Iranian president is even a "<WSD>truther</WSD>," insisting that there was a hidden hand behind Sept. 11, 2001. "Could it be planned and executed without coordination with intelligence and security services — or their extensive infiltration?" he mused in the letter to Bush. 
Meaning of the word marked with <WSD> tags:  Someone who believes that the US government was responsible for the 9/11 attacks. (from 21st c.)