Abu Hamza could face life imprisonment after being found guilty of all charges in his New York trial.
A jury of eight men and four women found the cleric, 56, guilty on all 11 counts he faced, handing Manhattan U.S. Attorney Preet Bharara his second high-profile terrorism conviction in three months.
The imam was extradited from the UK in 2012 after a series of court battles with the British government.
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Liam Fox warned Brussels to put the prosperity of EU citizens ahead of any desire to make the UK pay a price for quitting the bloc.