4 FBI v. FAZAGA Opinion of the Court and ex parte” if the “Attorney General files an affidavit under oath that disclosure or an adversary hearing would harm the national security of the United States.” §1806(f ). Three circumstances trigger these procedures: first, where the United States or a state authority gives notice under §1806(c) or (d) that it intends to “enter into evidence or otherwise use or disclose” FISA information; second, where an aggrieved person files a motion to suppress such information under subsection (e); and third, where “any motion or request is made by an aggrieved person pursuant to any other statute or rule of the United States or any State before any court or other authority of the United States or any State to discover or obtain applications or orders or other materials relating to electronic surveillance or to discover, obtain, or suppress evidence or information obtained or derived from electronic surveillance under this chapter.” §1806(f ). Once §1806(f )’s in camera and ex parte procedures are triggered, the court must review the “application, order, and such other materials relating to the surveillance as may be necessary to determine whether the surveillance of the aggrieved person was lawfully authorized and conducted.” Ibid. If the court finds that the evidence was unlawfully obtained, it must “suppress” the evidence or “otherwise grant the motion of the aggrieved person.” §1806(g). But if the court finds that the evidence was lawfully obtained, it must “deny the motion of the aggrieved person except to the extent that due process requires discovery or disclosure.” Ibid. B Respondents Yassir Fazaga, Ali Malik, and Yasser Abdel Rahim are members of Muslim communities in southern California who claim that the Federal Bureau of Investigation illegally surveilled them because of their religion. Re-