US officials become discouraged about anti-terrorist co-operation with their British counterparts against leading London-based cleric Abu Hamza al-Masri. Authors Sean O’Neill and Daniel McGrory will write, “They were sick of handing over information to British agencies about Abu Hamza, only to see him being allowed to continue preaching hatred in front of the cameras.” A senior Justice Department official will say: “We just did not understand what was going on in London. We wondered to ourselves whether he was an MI5 informer, or was there some secret the British were not trusting us with? He seemed untouchable.” [O’Neill and McGrory, 2006, pp. 294] The official’s speculation is correct, as Abu Hamza is indeed an informer for the British security services (see Early 1997). In the end, the US will give up on waiting for the British to arrest Abu Hamza, and issue a warrant of their own (see May 27, 2004).