While monitoring foreign terrorists in the US, the FBI listens to calls made by suspects as a part of an operation called Catcher’s Mitt, which is curtailed at this time due to misleading statements by FBI agents. It is never revealed who the targets of the FBI’s surveillance are under this operation, but below are some of the terrorism suspects under investigation in the US at the time: 
Imran Mandhai, Shuyeb Mossa Jokhan and Adnan El Shukrijumah in Florida. They are plotting a series of attacks there, but Mandhai and Jokhan are brought in for questioning by the FBI and surveillance of them stops in late spring (see November 2000-Spring 2002 and May 2, 2001); Another Florida cell connected to Blind Sheikh Omar Abdul-Rahman. The FBI has been investigating it since 1993 (see (October 1993-November 2001)); Al-Qaeda operatives in Denver (see March 2000); A Boston-based al-Qaeda cell involving Nabil al-Marabh and Raed Hijazi. Cell members provide funding to terrorists, fight abroad, and are involved in document forging (see January 2001, Spring 2001, and Early September 2001); Fourteen of the hijackers’ associates the FBI investigates before 9/11. The FBI is still investigating four of these people while the hijackers associate with them; [US Congress, 7/24/2003, pp. 169 
] Hamas operatives such as Mohammed Salah in Chicago. Salah invests money in the US and sends it to the occupied territories to fund attacks (see June 9, 1998).
When problems are found with the applications for the wiretap warrants, an investigation is launched (see Summer-October 2000), and new requirements for warrant applications are put in place (see October 2000). From this time well into 2001, the FBI is forced to shut down wiretaps of al-Qaeda-related suspects connected to the 1998 US embassy bombings and Hamas (see March 2001 and April 2001). One source familiar with the case says that about 10 to 20 al-Qaeda related wiretaps have to be shut down and it becomes more difficult to get permission for new FISA wiretaps. Newsweek notes, “The effect [is] to stymie terror surveillance at exactly the moment it was needed most: requests from both Phoenix [with the Ken Williams memo (see July 10, 2001)] and Minneapolis [with Zacarias Moussaoui’s arrest] for wiretaps [will be] turned down [by FBI superiors],” (see August 21, 2001 and August 28, 2001). [Newsweek, 5/27/2002] Robert Wright is an FBI agent who led the Vulgar Betrayal investigation looking into allegations that Saudi businessman Yassin al-Qadi helped finance the embassy bombings, and other matters. In late 2002, he will claim to discover evidence that some of the FBI intelligence agents who stalled and obstructed his investigation were the same FBI agents who misrepresented the FISA petitions. [Judicial Watch, 9/11/2002]
November 2000-Spring 2002: Florida FBI Investigates Plot to Blow Up Mount Rushmore
The FBI in Florida investigates a group of Muslims it suspects of being terrorists, including an apparent associate of Mohamed Atta named Adnan Shukrijumah (see April-May 2001 and May 2, 2001). The investigation starts with the November 2000 Florida arrest of Turkish immigrant Hakki Aksoy, who is found to be in possession of instructions for making a car bomb. An FBI informer named Howard Gilbert enters the Darul Aloom mosque in Pembroke Pines (a town just north of Miami) to check out one of Aksoy’s associates, Imran Mandhai. Gilbert starts plotting with Mandhai and a friend of Mandai’s named Shuyeb Mossa Jokhan. [New Times Broward-Palm Beach, 8/1/2002; Miami New Times, 8/8/2002; USA Today, 6/15/2003] Gilbert is replaced by another FBI informant known as “Mohamed the bomb maker,” who agrees to wear a wire and testify in court. Mohamed and Mandhai drive around South Florida selecting local bomb targets including a National Guard armory, electrical substations, Jewish-owned businesses, the Israeli consulate in Miami, plus Mount Rushmore in the Midwest. Mandhai and Jokhan are unable to buy weapons themselves, but Gilbert, the first informant, had given Mandhai a copy of a bomb-making manual, and Mohamed, the second informant, shows Mandhai the range of guns and explosives he can provide. [Broward Herald, 5/29/2002; FrontPage Magazine, 10/27/2003; US Court of Appeals for the Eleventh Circuit: appeal, 7/2/2004 ] The FBI interviews Mandhai and Jokhan in late spring 2001 and they acknowledge they are training for jihad. However, the FBI’s surveillance of them stops shortly after this. The FBI takes no action against them for a year, and then indicts them in May 2002. At the trial they are both found guilty; Mandhai receives twelve years and Jokhan five. It is unclear why the FBI acts in this way, although it is possibly related to a forced curtailment of electronic surveillance that is taking place at this time. In the summer of 2000, the bureau was ordered to shutdown certain wiretaps after an FBI official was found to have been misrepresenting petitions for taps on terror suspects (see Summer 2000-September 11, 2001). Coincidentally, after Gilbert and Mandhai develop a series of courses for potential recruits entitled “Skills Necessary for Jihad” in the spring of 2001, Mandhai prints them at the same Kinko’s copy shop in Hollywood that is used by Mohamed Atta and Hamza Alghamdi to buy their tickets for 9/11 (see August 25-September 5, 2001). [Broward Herald, 5/29/2002; Salon, 12/3/2002; USA Today, 6/15/2003]
April-May 2001: Florida FBI Investigates 9/11 Hijacker Atta Associate, Unable to Get Close
While monitoring a plot to blow up Mount Rushmore and carry out other attacks (see November 2000-Spring 2002), the Florida FBI investigates Adnan Shukrijumah, an apparent associate of Mohamed Atta (see May 2, 2001). Imran Mandhai is a leader of the Mount Rushmore plot, and he attends the same mosque in the greater Miami area that Shukrijamah does. Mandhai tries to recruit him for the plot. However, Shukrijumah declines and never says anything incriminating within earshot of undercover surveillance teams or an FBI informer using the alias Mohamed who has gotten close to Mandhai. The FBI investigates Shukrijumah anyway, but only finds that he lied on his green card application regarding a prior arrest. The Florida FBI is apparently unaware of his connection to the 9/11 hijackers. An investigator on the case will tell USA Today, “Shukrijumah sensed what Mandhai did not: that ‘Mohamed’ was an FBI informant.” After 9/11 the FBI will give Mandhai a lie detector test and ask him if he knew any of the terrorists involved in the 9/11 attacks. He says he did not, but his answer is judged to be false, and he confesses he was thinking of Shukrijumah. The FBI is also investigating Shukrijumah over another plot at this time (see (Spring 2001)). Shukrijumah apparently disappears from the Miami area around the time Mandhai and Jokhan are first interviewed by the FBI. He then travels around North America (see July-September 2001). [Miami Herald, 3/31/2003; US News and World Report, 4/7/2003; USA Today, 6/15/2003; ABC News, 9/10/2009] The FBI will later find that Shukrijumah is a top al-Qaeda operative and offer a reward of $5 million for information leading to his capture (see March 21, 2003 and After). [Rewards for Justice, 3/2003] The FBI informant named “Mohamed” is likely Elie Assaad, who will later claim he associates some with Shukrijumah and Atta at a Florida mosque around this time (see Early 2001).
