A female MI5 agent wore heavy make up and appeared to change her accent to protect her identity as she gave evidence in the Abid Naseer terror trial.
Naseer is accused of plotting a "second 9/11" in Manchester, Copenhagen and New York.
ITV International Affairs Editor Rageh Omar reports from Brooklyn:
After a most unusual trial in Brooklyn, jurors now must decide whether Abid Naseer plotted to blow up a Manchester shopping centre.
Osama bin Laden was sent letters updating him of the progress of terror cells in the UK, New York and Copenhagen, a US court has heard.
A man charged with drawing up plans to carry out terror attacks in Manchester, New York and Copenhagen is due to go on trial in the US.