“On August 17 [2001], agents in Minneapolis sent a detailed memo to FBI headquarters describing [potential terrorist Zacarias] Moussaoui and his roommate Hussein al-Attas. The memo stated that the office had reason to believe Moussaoui, al-Attas, ‘and others yet unknown’ were conspiring to seize control of an airplane. When Moussaoui refused to let agents search his laptop, they made the FISA [Foreign Intelligence Surveillance Act] request. …FBI headquarters refused the FISA request, claiming that its street agents in Minnesota lacked probable cause.”
– Peter Lance, 1000 Years For Revenge, Page 411