A Seattle man played a key role in the case against a radical Muslim cleric who was arrested yesterday in London on a range of terrorism-related charges — from aiding the Taliban and al-Qaida to trying to set up a jihadist training camp in Oregon. Abu Hamza al-Masri, 47, an Islamic leader in London, also is accused in an 11-count federal indictment unsealed yesterday of hostage-taking and conspiracy in connection with a 1998 confrontation in Yemen that left four Western tourists dead. As part of a plea deal in April 2003, James Ujaama, a self-styled entrepreneur who grew up in Seattle’s Central District, provided key information about al-Masri. Full Story