On March 29, 2004, 18 men suspected of involvement in an al-Qaeda linked fertilizer bomb plot are arrested in raids across Britain. Five of them, including head bomber Omar Khyam, will later be convicted and sentenced to life in prison for roles in the plot (see Early 2003-April 6, 2004). Dozens more have been monitored in recent months as part of Operation Crevice, the effort by the British intelligence agency MI5 to foil the plot. Of those not arrested, 15 are classified as “essential targets” deserving heavy surveillance. An additional 40 are classified as “desirables,” with a lower level of surveillance. Mohammad Sidique Khan and Shehzad Tanweer, future suicide bombers in the 7/7 London bombings, are both placed in the “desirables” group. Khan and Tanweer had been monitored repeatedly meeting and talking on the phone with head bomber Khyam. Khan was overheard saying incriminating things, like how he might hold up a British bank with a shotgun (see February 2-March 23, 2004). Incredibly, he was even recorded discussing how to build a bomb, his desire to leave Britain after the bomb went off, plans to wage jihad (holy war), and plans to attend al-Qaeda training camps in Pakistan (see May 13-14, 2006). But within weeks of the arrests of Khyam and the others, MI5 is distracted by another big surveillance operation focusing on Dhiren Barot, who is considered an important al-Qaeda leader living in Britain. As a result, the remaining Operation Crevice suspects are given lower priority and in fact Khan and Tanweer allegedly are not monitored at all. Additionally, even though MI5 knows the exact address where Khan lives, local police forces (which are not distracted by the Barot case) are not told that there are potential terrorism suspects who should be monitored. [London Times, 5/1/2007] Investigators will gather information about Khan’s car registration briefly in early 2005 and will learn his full name if they do not know it already, but it seems this will not lead to any more surveillance (see January 27-February 3, 2005). Apparently, Khan is also linked to Barot in some way, yet he is not arrested at the same time Barot and others are in August 2004, and he and the other 7/7 bombers still are not monitored after that (see August 3, 2004). As of 2007, only one of the 15 “essential targets” will be jailed for terrorism-related activity. [Associated Press, 4/30/2007]