Young British Muslims risk falling prey to extremists who want to radicalize them with terrorist propaganda and turn them against the West, the head of Britain's MI5 spy agency warned. More than a year after the suicide attacks on London's transit system, Dame Eliza Manningham-Buller predicted the fight against terrorism would last for a generation and said British authorities were tracking almost 30 plots involving 1,600 individuals. "It is a sustained campaign, not a series of isolated incidents," she said in a speech to small audience of academics in London on Thursday, according to a transcript released by the spy agency on Friday. "Radicalizing elements within communities are trying to exploit grievances for terrorist purposes." "It is the youth who are being actively targeted, groomed, radicalized and set on a path that frighteningly quickly could end in their involvement in mass murder of their fellow UK citizens, or their early death in a suicide attack or on a foreign battlefield," she said.