Federal prosecutors went after accused terrorist Mustafa Kamel Mustafa Tuesday, making him explain his most outrageous statements about al Qaida, Osama bin Laden and the 9/11 attacks.

In a morning-long cross examination, Southern District Assistant U.S. Attorney John Cronan repeatedly threw Mustafa’s quotes back in his face, eventually frustrating the 56-year-old one-time leader of the Finsbury Park mosque in London into saying the jury should be told about the “hallucination of all these charges.”