The agents in Minneapolis were having the same thoughts. Ghimenti was called and asked again for help on the search warrant. Later that day, the FBI seized Moussaoui's laptop.
On Sept. 12, Ghimenti and Humphries flew to Paris. Ghimenti told Humphries about the FBI's stalled inquiry into Moussaoui - the man who in December would be charged as an accomplice in the Sept. 11 attacks.
Humphries was eager to question Ressam about what he might know about the attacks on New York and Washington. But it took the agent five days to make it home to Seattle.
When Humphries was able to show Ressam a photograph of Moussaoui, Ressam said he recognized the French national as having been with him at the Khalden camp in 1998.
Given the opportunity, might Ressam have identified Moussaoui earlier, spurring the FBI in Washington to pursue the Moussaoui search warrant?
Might that warrant have yielded information that could have helped the bureau disrupt the Sept. 11 plot?
Humphries was haunted by the possibilities.
Perhaps if the Minneapolis FBI had told FBI headquarters that Moussaoui was involved with missile defence?