Contacts Among 9/11 Hijackers
75. Sheikh Mohammed said that the operatives were supposed to avoid talking to each other in the U.S., but did not know if they followed those instructions. Sheikh Mohammed added that closer to the execution of the operation, the operatives had to contact each other in order to organize their final details. Sheikh Mohammed stated that for operational security, he only had Bin al-Shibh, Bin Attash [(a.k.a. "Khallad")], al-Baluchi, and Mustafa al-Hawsawi contact the 9/11 operatives in the U.S. Sheikh Mohammed said he last had contact with Moussaoui via email, but could not remember the specific time frame.
The Second Wave of Attacks After September 11, 2001
76. While discussing the "tallest building in California plot," Sheikh Mohammed referred to the mission of Moussaoui and Faruq al-Tunisi as the "second wave." The phrase "second wave" did not originate with Sheikh Mohammed and has meant different things over the course of Sheikh Mohammed's debriefings. At one time "second wave" referred to any plans for attacks in the United States slated to follow 9/11, whether a sequel of aerial attacks or something entirely different, like subway strikes, poisoning o[f] reservoirs, demolition of bridges, etc. To clarify, Sheikh Mohammed
